94 2.2 5-sp s-10 with 92 GMC 305 700r4 running gear

[bigjoe1015]

Hello.

This is my new project. I have a 94 s-10 ex cab 2wd 2.2 5-sp. I just bought a 92 GMC C1500 305 700r4 that I am swapping in. I am keeping the 305 TBI, and to that end, I have the ECM pinout diagrams for both vehicles. (it's amazing how few wires need transplanted) My GMC was a work truck, so it has factory A/C delete (which is fine, I don't want it anyway), factory radio delete, (my s-10 has a radio, so I'm fine there), and the best part, I've been directly involved with the maintenence on this truck it's whole life, so I know it's solid.(except for the rear diff which just recently blew, that's how I came to have it).

My s-10 is just like 10,000 others out there, extended cab 2.2 5 speed 2wheel drive.

The plan:

Switch out the necessary wires from the s-10 ecm to drive gauges, fuel pump, MIL, and check engine light, and a few others.
Replace them into the GMC ECM into their proper locations. (again, I have the ECM pinouts for both vechicle.)

Use 94 S-10 4.3 Auto radiator. It's 2 3/8" wider, same height, same core thickness as the Vette radiator. It has the same hose connection sizes as the GMC, and it's a bolt in.

95 Taurus 3.0 fan with Hayden adjustable relay controlled thermostatic controller.

As for exhaust, that's where it gets sticky. I "would like" to keep manifolds. Be they stock GMC, Caprice, or Camaro. I don't like headers because of heat, and ceramic are just too pricey. Unless I can get a set of ceramic headers for under 2 bills, I'm putting manifolds on this thing.

For the record, I am not totally unexperienced here. I have done a carbed 327/th350 into a 91 s-10 2.5 in the past, and WAY too many other motor swaps to count, but this one is for ME. I want it my way, but I'm flexible to make it perfect.

If you guys who've done a 2nd gen swap have some insight or helpful advice to add, PLEASE DO. I want a first class swap.

Thanx in advance
Joe

[lt1s10onair]

are you lookin for big power? cuz, no offense, but you wont get it from as 305... its a great, reliable motor, but its just weak

[bigjoe1015]

No, I'm not looking for big power. I'm going to end up with double the current horsepower, so it will feel like big power. If I wanted big power, I wouldn't be putting manifolds on it. Just a reliable daily driver with a little something extra under the hood. Besides, the 2.2 is just about shot.

[lt1s10onair]

well i did the lt1 t56 swap on my 98, and it was a chore, but mainly cuz its mine... and we all know its worse to do ur own... buy the jtr book! ive said this to dozens of people, but its worth it... www.v8s10.com anything i can do to help, let me know... good luck!

[bigjoe1015]

I have the book. I'm a little disappointed in the lack of info on 2nd gen trucks, but there's definitely a lot of good info in there.

[bigjoe1015]

OK, so I've been yanking the dash out of the 92 GMC fullsize for the last couple days, and I've come across a few interesting things. Most of the connections are the same from the 92 GMC to my 94 S-10. Most notably, the ignition switch, headlight switch, doorjamb, and MAYBE the dash cluster, as it looks identical to the one in my dime. So I got to thinking that maybe I'd just swap over the entire harness, minus the chassis parts. (lights, horn, etc.)

Then I started taking tape off of things, and came across this connector. (photo 1) This connector disconnects the entire internal wiring from the ECM harness.

My thought is this: If the 94 S-10 has a similar (possibly identical) connector, I should be able to "plug and play". Does anyone with a 94 have a similar picture that I could compare the connection to and maybe just become the luckiest SOB on the planet?

I'll throw in a couple extra pics.

[bigjoe1015]

OK, so I've kinda answered my own question. YES, THE S-10 HAS THIS CONNECTOR. It is configured differently, so I will have to re-pin a connector, or two, but it should be fairly straightforward.

[bigjoe1015]

Got my A/C delete heater box from the dealer today! $42, but well worth it for new.

[philntx]

The 88-92 F-Body 5 liter TBI exhaust manifolds will provide the greatest clearance.

Having completed conversions with using the same radiator but with the Taurus fan, the flexalite 210 and the 99-02 LS1 Camaro, I'd recommend the camaro fans over the Taurus fan. Just personal preference, primarily since they are newer and pull less amps than the Taurus on high.

You'll be happy with the 5 liter for a couple of years.

I ran one truck with a 5 liter TBI motor but ran a true dual exhaust. I had a pesky SES light that was caused by low backpressure against the EGR. Finally had it tuned out.

[bigjoe1015]

Quote: Originally Posted by philntx

The 88-92 F-Body 5 liter TBI exhaust manifolds will provide the greatest clearance.

Having completed conversions with using the same radiator but with the Taurus fan, the flexalite 210 and the 99-02 LS1 Camaro, I'd recommend the camaro fans over the Taurus fan. Just personal preference, primarily since they are newer and pull less amps than the Taurus on high.

You'll be happy with the 5 liter for a couple of years.

I ran one truck with a 5 liter TBI motor but ran a true dual exhaust. I had a pesky SES light that was caused by low backpressure against the EGR. Finally had it tuned out.

I have those manifolds, now.

I plan to use an engine driven clutch-type fan. Not electric. (Changed my mind on this one.)

I have loved the 5 liter for a long time. Great mileage, and in an S-10, plenty of power.

I was concerned about the backpressure since I'm only running one O2 sensor in the driver side manifold, and no catalytic converter. My question is, were you running OBD 1 or 2? OBD 2 is very "back-pressure demanding" whereas OBD 1 isn't.

[bigjoe1015]

Need to change the name of this thread. I got the theme and vision for my project.

"Project: Death Trap"

[bigjoe1015]

Need to learn how to post photos first!!

[bigjoe1015]

Got my motor mount plates today!

Kick azz!

I've had a couple requests for the part number for the AC delete box.

GM# 52474409 Fits second gens only (as far as I know.)

[zms2004]

I looked up hp and torque charts one time and I believe the 305 only had like maybe 5 more horses than the 4.3 but I think the torque difference was significant. But good luck! What mounts you use? Jtr?

[bigjoe1015]

Quote: Originally Posted by zms2004

I looked up hp and torque charts one time and I believe the 305 only had like maybe 5 more horses than the 4.3 but I think the torque difference was significant. But good luck! What mounts you use? Jtr?

Yeah, JTR.

I'm putting in the 305 for now because it runs well, and it's what my donor has.

Last week I got a 350 from a 93 that needs a rebuild. I got it for free. From what I determined, all I need to do to swap in the 350 is change the chip. Same computer, wiring, etc.

[TrailTamer]

what parts # for that engine mount adaptor you got from jtr? what i've noticed that jtr not really tell what year or 1/2 gen truck the parts will work on, thanks

im looking forward to do a v8 swap on my s10 by this summer (if im lucky)

[bigjoe1015]

#4090.

Yes, they don't say, but if you buy the book, it makes it easier to figure out.

[bigjoe1015]

Quick update. Got the Cherokee steering shaft installed today. $13.80 from the boneyard. Didn't have to cut anything, bolted right in. 1987 Cherokee if anyone cares.

[bigjoe1015]

Swapped out the AC heater box for the Non-AC box tonight. Didn't take but a couple hours. First photo is old, second is new.

[bigjoe1015]

OK. Here goes. I started yesterday at noon. I have 2 weeks vacation to get this all done. I started a week early by tearing the V8 down and replacing the timing set and all the gaskets. I also replaced the filter and gasket in the trans. both were bolted back together and I will be putting them in tomorrow for there first test fit in the truck. Started pulling the 2.2 from my truck yesterday and just finished tonight. (Lots of bad storms slowed down my progress.) Enough talk. time for pictures.


the victim



My boy helping out.



craigslist fodder

[Project Dime]

looking good man keep up the work. and could u get a pic or two of the Cherokee steering shaft u installed please. u said it bolted right up?

[bigjoe1015]

I'll get a pic for you later today. Yes it bolted right up. I did have to separate the two halves of the shaft and remove the plastic bushing inside of it, but other than that, it was a bolt in. More pics. These are motivational. The motor is in!!!!!!!!!

[bigjoe1015]

As requested: Steering shaft. Top and bottom.





And some progress. I got the radiator mounted with the help of my brother. We used the A/C condenser mounts to bolt the new rad into place. (forward position) Better pix tomorrow.

[Project Dime]

kool thanks man. and the truck is coming alone nicely.

[bigjoe1015]

Update over the last two days. I haven't done much except wiring. I HATE WIRING. But it is coming along nicely since my brainstorm earlier this morning. Yesterday I connected the engine harness to the C100 connector on the S-10. The C100 is the big oval plug above the brake booster.



This is the C100 plug.



My brainstorm earlier today came when I came to the other end of the harness. It is the side where the computer wiring comes through the passenger side kick panel. I needed to tie the GMC wiring to the S-10 harness. I was going to re-pin everything, but couldnt come up with the connectors so I decided to build a jumper harness similar to that used by audiophiles to hook up stereos. It's not quite done, but its a hell of a lot further than I was this morning.




On another note, I got the radiator mounted as I already stated, and I have a decent picture of the mounts that we built.



I also mounted the fan in place tonight. It is too large (at 19 inches) but I have ample clearance from the radiator. There is almost 1.5 inches between the clutch and the radiator. I will have to get a 17 inch fan, but it should work OK.



Lastly, I mounted my driveshaft tonight, and I am severely pissed that I have to shorten it a half an inch. The yolk bottoms out in the trans when the carrier bearing is bolted down. It fits, but there is NO adjustment. I could probably use it as is, but since I need new U-Joints anyway, I might as well have it shortened and balanced at the same time. Night all. More wiring tomorrow.

[bigjoe1015]

Got the wiring done today. Thats about it. It took all day, and I'm done now. Hopefully. We will see when I hit the key if it works.

[5.74x4]

looks good so far. my 94 had the dam vcm computer so i had to build my complete harness from scratch when i did my TBI 350 swap.

P.S. I could use that 2.2 if you are selling it and would ship it.

[bigjoe1015]

It's already gone. I put it on Craigslist and a guy came and got it the next morning. Sorry.

Thanks for the kind words. I got lots of little shit done today. The topside is done except for the fuel return line that I have to replace. It twisted cuz it was rusty and ripped a hole in it, so now I have to replace that. The shifter is in. I got a B&M because I couldn't find a blazer console and shifter fast enough.

The driveshaft is at the shop getting shortened 1 inch. Its also getting new joints and carrier bearing. I won't get it back until Tuesday, Wednesday at the latest. I hope I have everything else done by then. At the pace I'm going, the driveshaft should be the last thing. Pictures tomorrow.

[bigjoe1015]

It's all done and it runs great!!!!!! Eleven days and change from start to finish. I started the swap last Saturday at noon and finished tonight at about 5:00pm. I fought an injector power wire all day until I remembered that I disconnected it for some stupid reason. Once I reconnected it, it fired up and once it was timed, it purrs like a kitten. The only item from the GMC C1500 that I didn't end up using was the fan. I had to use an 18 inch fan instead of the GMC's 19 inch. All of the accessories fit just fine. The air cleaner fits without modification. Same belt, same air filter, alternator, idler, tensioner, everything! The radiator I used was from a 2004 S-10 with a 4.3. It has no shroud right now, but will be getting one. It sits at about 190 after idling in my driveway for half an hour. Quick as hell, and although I don't normally worry about such things, it left two sweet black marks up the street for about 40 feet before both tires grabbed. Not bad for a 305 with over 200K on the ticker. Still has 50lbs of oil pressure at an idle and ALL of the gauges work just fine. I was able to keep to my guns on this one. Engine driven fan, manifolds, and all of my factory gauges still work just fine as does the fuel injection. It was about six months of pouring over wiring diagrams to plan a harness that I never really used anyway, but without those six monts, I never would have got it the way it was supposed to be. Enough bullshit, time for pics.


front view.


from the side



from the other side with the ubiquitous beer can thrown in for measurement.



Thanks to everyone for their help with all of my stupid questions. I couldn't have done this without your help. Muchas Gracias, Amigos!!!!!