Swapping? Heres A List Of Parts And Answered Questions!

[raelayotte]

so far my 2.8 to 305 has been free

[raelayotte]

so far my swap has been free

[s10-den]

Quote: Originally Posted by curtis026

If your using the computer off your old 4.3 non vortec to put on the new 350 isnt it going to make your engine run lean? I thought you had to get the computer and all that stuff that was made for the 350 to make it run at the right mixture? Could be way off on this one, im new to working on Chevys.

you CANNOT use the stock 4.3 computer!!!!!you HAVE to change the prom!!!!!!!

[s10blaza]

Quote: Originally Posted by s10-den

you CANNOT use the stock 4.3 computer!!!!!you HAVE to change the prom!!!!!!!

For the short period of time I had mine running, it ran on the 4.3 computer. Didn't run good and wasted loads of gas, but it ran. So theoretically, yes, you can use it

[Junkthesixcyl]

I beg to differ. i have heard, seen and known of a few people Keeping the TBI injection on thier v8 swap. They got the TBI injection unit off of a V8 or used a udjustable Fuelpressure regulator. It Has And can be done. You will have to change your fuel pump for a higher volume one though.

[nhelean18]

ok well here go's....... i have an 89 s-10 blazer 2wd. it hade a 4.3 v-6 in it, im planing on running a 89 camaro posi 3.73 rear end, and im not shure what tranny, i want to run a 350 crate motor or possibly have one built, i want it to be carbed. does this sound good or should i change something, what else should be done or do i need to know about this swap into my truck. thanks -happy new year!!!!!!!

[LowRidinBlazer]

Ok, just a quick question, I have a 91 s10 blazer 2wd 4.3 TBI... will my tranny work on a 350 TBI? Also, I know its pretty much a drop in swap with little work here and there, do I need to get the matching computers and harness for the 350 so everything works fine? Thanks

[Chevy 4 Life]

i have a question would it be harder to put a 350 in a newer s-10 becase i have a 99 with 151,000 miles on it and i know that engine doesnt have that much life left in it. its a v-6 manual and im thinking of putting a 350 with a turbo 400 in it. would there be anthing that would make this harder than in an older style s-10.


or if i get alot of cash before my old engine goes i could get a twin turbo 350 with 1000 hp but then i would probably have to box the frame and possibly narrow the rear end. so that would take alot of cash.

[bmack8613]

^ make sure you get a life insurance policy before you do that twin turbo and i hope you have a money tree

[xtreme11678]

ok guys ive been readin alot of helpful info here... im swappin out my 2.2 outta my 97 dime for a 73 carbed 350 only concerns i got is the computer and harness... i know none of that suff will hook up to the new one... but are there any wires i should not mess w/ or have to keep while undoing everything gettin ready to pull out the 4 banger... any info would be helpful and appreachated thanks

[bammax]

I may be doing a 350 swap for someone and needed to know a couple specifics. Assuming it doesn't sell, I have a '88 fullsize Blazer with a TBI 350 and 700R4 to sacrifice. If I got an '87-89 S-10 Blazer then what would I need to get as far as parts go? I think I read headers, mounts, radiator, driveshaft, fans. Is there anything else? Also can I just hook the PCM from the 350 in place of the S-10 PCM or do I need to transfer over the wiring harness with the 350?

[isonic]

Bammax: From what i have been reading the 350 computer will work with the 4.3 harness. The only modification to the stock harness that you will need to make is to lengthen the knock sensor wire to reach the new location. As long as the s-10 was a 4.3 Tbi then it should be a direct fit. I am looking to do the same to my 93 s-10. From what i have read it is possible to use your stock radiator with e fans, lots of people use aftermarket. Instead of headers you can use camaro manifolds - they are a lot cheaper.

[s10blazerman4x4]

Here is what the mechanic and i are doing now.If your going 4.3 tbi to 5.7 tbi.We got a 5.7 computer and used the 4.3 harness. Instead of relocating the knock sensor if you look on the 4.3 where it is at the top of the motor towards the distributor on the v8 you can tap and thread that for the v8 knock sensor. Then the plug goes on to it without lengthening it. I would recommend either moving it back the engine or cutting the support. We did neither and are having problems right now with certain things. You can use taurus fans but we could not due to the space we ended up having to goto a 16" slim fan. the 7004r will work but needs to be beefed up.Im stock 215-230Hp so i got him a shift kit, corvette servo for it and we think it should hold up for awhile. Also get a tranny cooler, if you need the part number i can get it. Were using the 4.3 rad and right now since we have the motor and rad where the 4.3 used to be we had to use a 5.0 88 camaro hose the bottom is up in the air right now.Hope to get that resolved in the morning. Were using camaro manifolds for the engine because then we dont have to worry about modifying the shaft and there cheap as hell. Your just gonna need to use pipe plugs on them if they got the AIR system. Also the 4.3 serp setup will work just fine and we removed the AC from the truck. If your motor is gonna be where your 4.3 was either remove the ac or figure out how not to puncture the heater/ac box. He put a hole in mine from the motor going in but we removed the AC so it doesnt matter. Also get a 4.3 throttle body and slap in the 5.7 injectors. We tried to use a 5.7 TBI unit but had an odd ball or something because we could not get the TV/detent cable to work and i could not tell you what he used he just got one from his beer trailer and made it work. Also for the power brake booster either run some splits and vac lines to the egr and then hook up that line or do what my mechanic did. He tapped a fitting into the manifold and hooked up the line their. Some of the brackets on the 4.3 will work but most might have to be heated and bent.Mainly the ones to the passenger side of hte 4.3 TBI you got now. Your gonna need a 5.7 coil bracket and coil. Also if you got 4x4 your gonna need to make an oil pan, buy the oil pan, or get someone to make you one. I had one made and the man is my hero for that. Also you should be able to get a 5.7 passenger side dipstick for the motor to work just fine. The 4.3 rad fan shroud had to be cut on mine and the bottom where the rad sits on had to be chopped too. Thats all i can remember for now PM if you need more info i can try to help you out. All the research in the world helps but your always going to have swap related problems no one else has run into. Be prepared to be nickle and dimed to death at points and have massive stress headaches at times when you dont know what the heck to do.

[LMK2005]

I dont know if anyone has done this swap, but ive been trying to find out some info. Has anyone swapped a 5.3L vortec (1999 and up). I'm currently wanting to swap my drive train out, because it doesnt work anymore . I really want to do the 5.3 with the 4l60e transmission. So if anyone has some info on this swap. Please let me know what kind of problems and stuff to look for. Thanks.

[toslow4u]

lt1 out of a 95-96 vette... and the 5spd trans can i use the 5 spd from the lt1????

[2LO4SNO]

99 s-10 2.2l 5-speed reg. cab short box

heres the deal, i am going to go with a carburated v8 either 327 or 350 possibly bigger and also want to retain a manual tranny (t56), but i am having a little trouble on what i need to make this install happen. can someone help me out and tell me what all i need such as which motor mounts and will i have to do something to the driveshaft and basic things like that? i have had a v8 s-10 in the past but it was a older year and i did not do the swap myself.
aslo i was wondering after the swap what will be different as in gauges not working and what will i need to fix that problem?

any help with be appreciated
thanks

[s10-den]

Quote: Originally Posted by lodi3qtr

I have it on tape I just have to find time to find it.Give me a couple of days.:thumbup:

DID YOU EVER FIND THAT TAPE???I WOULD LIKE TO SEE IT.

[s10-den]

Quote: Originally Posted by tstclr

So.. If I go from a TBI 4.3 in my 89 S10 2WD to a same vintage TBI 5.7, do I have to mess with trans/drivshaft locations or do they stay put? Can I use all my accessory mounts (Ac etc) and stock radiator? Can I use my stock throttle linkage? Also, all I'd have to do is change the PROM for a full sized truck application with a 5.7/auto, right?
Thanks
Todd

it will be the exact same fit everything!!!!!

[s10-den]

Quote: Originally Posted by s10rcn

so i will have to get all new guages then?

you will not have to get new gauges....none of the gauges are hookes to the fuel injection

[s10-den]

Quote: Originally Posted by s10blaza

For the short period of time I had mine running, it ran on the 4.3 computer. Didn't run good and wasted loads of gas, but it ran. So theoretically, yes, you can use it

you are right,i meant the prom...

[s10-den]

Quote: Originally Posted by Beeker

Ok Boys and Girls, I know a lot of you have questions on doing a swap out of your poor 4 bangers or mere 4.3s to run with the pride of having a V8. First Id like to Say, YES, it can be done. Here is some Common known engines that will fit.

305
327
350
400

Now I know you can bore out and everything, but anything it that range will fit with no modification to the firewall. 427s and 454s, CAN be done, but involves more serious firewall work, and is only recommended if you’re really into it. Keep in mind; ANYTHING is possible with Time, Money, and a Welder

-----------------------------2.2 L EFI>>>>>> 350 V8 EFI------------------
Now Ill start off with you 2.2 guys, since your struggling for power the most. First of all, the swap of a 2.2 requires a lot of time and patience. To make this easier, I’m doing a fuel-injected engine to a fuel-injected engine. Meaning there’s no need for gas tank modifications. If you go from carbureted to EFI, or vice versa then you need a new Gas tank unit for the appropriate method.

Ok, now lets start.

THESE PARTS *NEED* TO BE REMOVED-

Engine
Tranny
Radiator
Harness
Computer

THESE PARTS STAY-

Master Brake cylinder
AC/Heater boxes

THESE PARTS WILL BE *NEEDED* -

350 Engine (COMPLETE - IE Alternator, Intake, Fuel Injection unit, ect)
Engine mount adaptors (See links at bottom of thread)
Headers (See links at bottom of thread)
Tranny
Computer
Harness
Radiator
Electric FANS

*** Note, when buying parts, keep in mind what engine you have ect, make sure that your harness will work with the engine, the computer is for a Standard/Auto tranny ECT. Make sure everything’s right B4 you dig in****

PARTS THAT CAN BE USED FROM A 2.2, BUT RECOMMEND REPLACING -

Coolant over flow tank
Washer fluid tank
Drive shaft (will need to be modified if you keep it)
Rear End

Ok. That’s the gist of it. Like I said, there’s A LOT of work involved in it for a 2.2>350. If you have it hired out, expect an easy $3k labor bill, On top of the parts costs.

(Remember you can always ebay that 2.2 and parts as well to make a little income back, some people like all Show no go )

INSTALLING -

If you’re doing it yourself, get a manual from the links at the bottom of the page, and read up. Common engine knowledge helps, (IE what’s where for what purpose) oh yeah, and you need to be able to turn a ratchet . Basically, Run the Harness and computer first. It will go in the same way the old one came out. Your probably going to have to have a custom harness made for some things like gauges and stuff. The Manual at the bottom will tell you all about that. But once the harness is run and installed with the Computer, then you should mount the tranny. This is where the drive shaft modification comes in, depending on what tranny you got, it will prob. have to be shortened. I recommend a new drive shaft, even though the old one IS possible, for a couple of reasons. A) I new one will be stronger, and will fit properly. B) It will save you time of replacing the old one down the road if it does break. You have a 350 now, so your going to want to go fast, that skinny pipe isn’t going to hold up to too much. Once the tranny is in, drop in the big bad 350. A lot of people ask about front spring suspension, I went from 4.3 > 350 with no change in height, 2.2 springs maybe weaker (but at least it will look lower) But once the engine is in, plug it all in, Run coolant lines, ect. And put the new Corvette Radiator in, or whatever new radiator you got for the v8 application. May need some custom mountings, but nothing too bad. And then, hook up your electric fans. I HIGHLY recommend dual 14" fans in FRONT of the core support. Mine work WONDERS and with just a little back notching of a plastic easy to get at grill instead of messing with the firewall to get one between the Radiator/engine. Now except for a few odds /n ends, that will pretty much cover it.

---------------------------4.3 TBI to 350 TBI----------------------------------

To make this easier, I’m doing a fuel-injected engine to a fuel-injected engine. Meaning there’s no need for gas tank modifications. If you go from carbureted to EFI, or vice versa then you need a new Gas tank unit for the appropriate method.

Your job is A LOT simpler in most cases. But don’t let that fool you, its still a chore to do.

If you have a 4.3EFI from 87-93 TBI, if you get a V8 from that same time frame that’s TBI, you have little or no wiring issues, everything that plugs into the 4.3, will plug into the 350. When we did mine, we used everything from the 4.3 on the 350, including Throttle Body, Power steering, Water pump, Harness, and computer. But if you have a vortec, and are switching out, you need to pull harness and computer, and you need a complete 350, as most parts wont transfer. So with that in mind, here are the parts lists -

THESE PARTS *NEED* TO BE REMOVED-

Engine.
(If 94+ vortec to any other 350, Harness and Computer)

THESE PARTS STAY-

Master Brake cylinder
AC/Heater boxes
Tranny
Drive train
Radiator (pull it to remove/install the engines though)

PARTS that will be *NEEDED* -

Engine
Engine mounts (See links at bottom of thread)
Headers (See links at bottom of thread)
Electric fans
Harness and computer (if 94+ swap)
***NOTE, when purchasing harness/computer or having a harness made, make SURE it’s for the proper Tranny and dash setup!!! Hate to plug it in, and not have it work!!! ****

Basically, its the same install path as the 2.2, get your harness in, and computer, install the new engine mounts, then drop the engine in, plug it in, Install headers. Put rad. Back in. once again, I recommend the fans in front of the Core support. Get in and test it out. ect.

****For Both Installations- if you want the fan in FRONT of the V8, and behind the core support, you need to shorten the drive shaft, scoot the tranny back, pound some room on the firewall for engine tabs, and Distributor Clearance, and slide it all back on the Engine mount adaptors. Keep in mind, that’s makes extremely hard to do menial tasks/tune ups, such as Replace Spark plugs, install new Wires, and Run exhaust. ****

Now this was just a ROUGH sketch of a swap, and it answers most questions, with a few recommendations, here are the links for the manuals, and parts -

JTR - lots of people use these guys

Advance adaptors, will have all your answers here too

Any MORE questions, post them in here, We'll be glad to help, plus this will clear out the clutter in the V8 forum, about everyone asking about swaps

Thanks guys, and many happy cylinders!

you do not need another gas tank if you are going from fuel injection to carb....

[Mystic_Knight]

I'm currently working on doing a 350 swap into a '91 4-door Jimmy. I'm not a professional auto mechanic or anything, just a guy with some cash and a few buddies that are willing to help out.

People have to realize that there are a TON of options for a swap like this. There's also a ton of opinions on the 'best' way to do it. The first thing people need to do is figure out exactly what they want. Do you want a V8 conversion that will win races at a track or a V8 conversion that's low maintinence and dependable? Between those two extremes there's a million options. You can't just say "I want a V8".

If you're concerned about the computer do like I did and just get rid of it and run a carb. Some people have a problem with the JTR 'bible' because it has you do a lot of work that's not absoloutly neccessary to get a V8 to run in an s-series truck. There's a difference between just 'getting it to work' and 'getting it to work and be dependable'. It's a good reference if you want to build a dependable V8 conversion in a daily driver. You don't HAVE to do everything it says.

I'm leaning towards the dependable side. Because I want dependable AND some decent horsepower it will cost some $$. I traded my 4.3 V6 + $300 for a 1977 350 with an Weiand intake, Proform distributor, Edelbrock 600 cfm carb, and powdercoated pullys + all the V8 conversion parts from the guy that had this V8 in an '83 Blazer. Then I took it to a machine shop and had it cleaned up, magnafluxed, and rebuilt with a slightly more agressive cam. They found a couple of cracked seals in the heads and replaced them. In the end that ran me about $1400 and it has a 2-year 28,000 mile warranty on it.

If you want dependable don't forget the trans and rear end. I bought the '91 Jimmy with a blown motor so I couldn't drive it when it was purchased. Once I pulled the trans I found out it was scrap too. So, now I'm buying a new trans with billet servo, TransGo shift kit, and a few other mods to keep it dependable for about $850. The rear end will have to wait till I can find a good one from a scrap yard. I'll probably spend the first summer breaking in the engine and going kinda gentle on it anyways.

I have some parts I'm looking to sell so I can upgrade to better parts. If you're in the Detroit area and looking for 2.8 to 350 SB engine mounts or Headman headers that are in ok shape PM me and we'll talk.

[booosward]

hey guys i have a 1991 s10 4.3l 4x4 and i came across a 305 from a 81 chevy 1/2 ton, well i just bought the whole truck and i was wondering if this can still work and what would i have to do and need if it did?and if i could use any of the axles off the half ton. id really appreciate the help i would like to get started on this project as soon as possible and would you be able tto email it to me, its just easier to find my address is justin_bussard@hotmail.com, again this would be a great help


[

[Blazinlow15]

Hye i have a 1996 Chevrolet blazer. It had a 4.3 in it and i ripped it out computer and all and dropped a 283 small block in it carbd.. Wel now im stuck i have no fukin idea how to wire it or which wires to run to it or nething i need major help..

[I_Heart_S_Dimes]

So if I go with a 350 carburated in a 91 blazer, I dont have to worry about the guages and stuff not working. Just rip all the computers out and forget about them, right?

[fetuss10]

Quote: Originally Posted by I_Heart_S_Dimes

So if I go with a 350 carburated in a 91 blazer, I dont have to worry about the guages and stuff not working. Just rip all the computers out and forget about them, right?

If you dont want any gauges sure. But the stock gauges won't work because there electric and if you carb the 350 you'll need manual gauges.

[my85grandnational]

So if I have a 93 Blazer with the 4.3TBI in it I can use the same computer on a TBI small block chevy engine if I put a prom in it from a full size truck of the same year?

[jwyndsdime]

what kinda manual tranny is the easiest to mount and is easy to get?

[SuperSS27]

Quote: Originally Posted by my85grandnational

So if I have a 93 Blazer with the 4.3TBI in it I can use the same computer on a TBI small block chevy engine if I put a prom in it from a full size truck of the same year?

Yes.

[SuperSS27]

Quote: Originally Posted by jwyndsdime

what kinda manual tranny is the easiest to mount and is easy to get?

A stock S-10 tranny NV3500 or T5.

[PAINTitFLATblack]

if you use a 305 and you put the fans infront of the core do you dtill have to shorten the drive shaft...and also can i use the stalk 5 speed out of my 4.3 with the 305?

[SuperSS27]

Quote: Originally Posted by PAINTitFLATblack

if you use a 305 and you put the fans infront of the core do you dtill have to shorten the drive shaft...and also can i use the stalk 5 speed out of my 4.3 with the 305?

Yes, it will bolt up to the 305 no problem. You may want to get a better clutch though.

[sik rig]

What motor mounts to use for 4.3 to 350

[Refill114]

it dose no say any thing about a 2.8

[Refill114]

would it be the same as a 4.3

[Supercharged4X4]

Does anyone know if the computer from an 85-92 Camaro with a TPI will connect to the dash Harness of an 88 4x4 with a 700r4. I know that I will need the oil pan and pick up. I also know that I cna disconnect the Harness to the computer from the fuse block.

[tazman]

hello i was reading the thread and was wanting to know if anyone could tell me how to get two 14% pusher fans to fit on the core of the rad and if nto if there is a way i could build a shroud to shroud the air from just behind the grill in to the rad with some tin as i already purchased it and want to try this as i think would help me more as the air would travel thrue the entire radiator instead of just two spots
when we hit 115 temps here in southern utah i wana still be able to drive my
s-10 and not worry about over heating any and all pics and help is greatly apriciated

[83baggeddime]

Can anyone help me on a 1.9l isuzu motor to 350 conversion. Does anyone know if it can be done and if so how hard and time consuming this maybe. I will be doing the work with 2 friends who are mechanics.. Does anyone know what parts i can reuse and what parts i might need? Any and all help will be greatly appreciated and thanks in advance,,,

[cdnrednk]

I was watching trucks when they did the 4.3 TBI (1994 ext cab S-10) swap to a 350 TBI. All they did to the computer was a chip to run the new v-8, not a whole new computer and harness...
Since I have a 94 TBI I plan on the same thing, but I can't find what it is they plugged into their ECM. I could do this swap pretty cheap myself. I have a couple 350's that I can get my hands on easily enough for nothing.

[down2earths10]

im swapping in a 68 327 with vortec heads, and im having trouble finding a power steering pump bracket so i can bolt my stock powersteering pump up. anyone got any solutions?

[mij]

hello all, i have a 1992 short wheel base gmc sonoma 4.3.i have the hooker header swap plates ,has anyone used these plates? they mount on the chassie and use the 350 mounts.I will be using the hooker header long slip headers, one tube goes out the fender well. I will be using a th350 although if i had it to do over i would use the stock 700 trans[IMG]images/smilies/frown.gif[/IMG] i have read alot on these forums but have yet to see anyone use these plates.I have removed the front cap,motor,trans and am about to start trial fitting.Any input would be apretiated or advise.I dont know if i will keep the airconditioner?I have a older 350 1968-85 (650 holly)
thanks jim

[NiceS10!]

$$$$$$$$

Ball park price for a 95 conversion 4 cylinder to a v8???

[s10-den]

Quote: Originally Posted by mij

hello all, i have a 1992 short wheel base gmc sonoma 4.3.i have the hooker header swap plates ,has anyone used these plates? they mount on the chassie and use the 350 mounts.I will be using the hooker header long slip headers, one tube goes out the fender well. I will be using a th350 although if i had it to do over i would use the stock 700 trans[IMG]images/smilies/frown.gif[/IMG] i have read alot on these forums but have yet to see anyone use these plates.I have removed the front cap,motor,trans and am about to start trial fitting.Any input would be apretiated or advise.I dont know if i will keep the airconditioner?I have a older 350 1968-85 (650 holly)
thanks jim

yea sure have.if you use the hooker headers you HAVE TO USE THEM PLATES!!! worked perfectly fine.WILL NOT CLEAR ANGLE PLUG HEADS THOUGH!

[down2earths10]

what are people using for power steering mounts?

[bluedragonx]

I'm swapping the whole pump out for what came stock on the 80's V-Belt setup, it's just a Saginaw P/S pump. I looked at the pump that was on mine and there's no way it's going onto the V8.

[down2earths10]

im thinking about buying a new pump and bracket that i know will fit. that might be my only option at this point

[dbprecision2002]

Quote: Originally Posted by NiceS10!

$$$$$$$$

Ball park price for a 95 conversion 4 cylinder to a v8???

5.3L cheap Ls1 about $1,300
Trans- $700-1000
V8 kit $500
Harness $750
Rear End can vary
Exhaust-100-and up
______________________
$3500 GIVE OR TAKE


Then Labor if needed, odds in ends stuff, bigger brakes, wider tires etc..

[dragin body]

i've got a 2nd gen regular cab..i've been lookin into doin a motor swap...possibly a 4.3 or a small block..my truck has a 3.5 in body drop do you think i'll have any clearance issues with the firewall?

[1988S104.3L]

Hey guys, i have a problem and i was wondering if you could help. I have a 1991 S10 with the stock 1991 TBI wiring harness. I also have a 1988 305 TBI motor and ECM. The plugs were different from the v8 egr to the v6 harness, so the egr solinod were swapped to the v6. I also had a problem running the heater controls since on the v8 they are electric and on the v6 they were vaccume operated. I have tapped into the manafold for the heater vaccume (the plug behing the TBI and to the left). The "check engine" light come on while drive on the highway and motor gets up to temp (egr) and i have a big flat spot.
any help would be greatly apprietiated
thanks
-jeff

[johnwwwwww]

ok i dident see this queston. im going to start on my swap tomarow i have a 88 s10 will i have to beat in the fire wall to fit my h.e.i. dist. or is their enough room ty jw