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Discussion Starter #1
Ok I know this probably has been beat to death and I know there is all kinds of stuff out there but I have been reading so much my head is now spinning.
What I have is a 1982 GMC S-15 single cab short box pick-up. Now my Aunt bought this truck brand new and drove it up until she passed away a few years back. This was a plan Jane truck with a 2.8, standard tran, no power anything and rubber mats.



I am now in the process of repainting it and I have bought the power brakes, power steering, power windows, rear slider and power sunroof for it as well as an Auto tran. Lowering kit and 18 wheels as well as a hard shell tonneau cover.



Now I am thinking about what I am going to do with the motor. Looked at small block and decided no. Looked at just redoing the 2.8 and adding Intake, cam and headers. Now I am thinking if I am going to rebuild the 2.8 why not just buy a rebuilt 3.4. So I did find this

http://www.rebuiltenginestore.com/engine/22578/1993-1995_chevy__engine_3.4liter.html


So if I decide to go this route am I understanding right that the tranny I bought will bolt up to this and I can go with the Edelbrock intake that is listed for the 2.8 and use the 4 barrel top and go with the Holley 390cfm carb. Also go with a comp cam listed for the 2.8 and headers for a 2.8. Then use all the brackets and pulleys as well as the distributer, oil pan, water pump, motor mounts and stuff from my 2.8.



Or is there more than just that and a few other things that I have to look out for?




Also I have read that some have gone with a TBI from the 80’s , so what would I be looking for and what is involved with going that way instead of the carb.
Bruce
 

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Boozebag
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If you are going to rebuild the 2.8, then go 3.4.
Your 82 was a carb engine from the factory, although you can go with fuel injection, it will be a considerable amount of work, and a donor vehicle with injection will almost be required.
Remember, not only do you need the engine management system (ECU, wiring harness, all sensors etc) but you will also need to set up the fuel system for the injection. The 82 does not have a compatible fuel system for injection.

All of this means nothing if you have the patience, ways and means to do this kind of a project. It sounds like you are going into this big time.

BTW, there are several hidden costs at the web site you tagged. They will probably hit you with a penalty for a 2.8 core, and there is shipping both ways for the engine. If you shop, you can find a good used 3.4 for a reasonable price.

The 3.4 is a drop in to replace the 2.8. Most of the 2.8 components will interchange with the 3.4... BUT... there are a few things you will have to consider.
The 3.4 is balanced differently than your 2.8, so you will need a flex plate/flywheel from an 88 or newer 2.8.
The water pump is different on the 3.4 also. You will need a later serpentine belt assembly from an 86 or newer 2.8, or swap all of your 2.8 stuff (including timing cover) to the 3.4. The water pumps rotate in opposite directions from the 82 2.8 to the 3.4.

Even though the oil pans look the same, use the one from your truck. The crate engine pan may work, but I am not sure.

Headers, intake, distributor, cams and the majority of the rest of the engine components interchange.

If you actually get around to doing this swap, the guys on the forum will be happy to help out with info.

I can say this much: I learned the hard way. :rolleyes:

You may have seen my rig... the "Voodoo" truck. It has a ' 3.4 that is set up with every conceivable bolt on or bolt in, short of the rotating assembly. It runs high 14s at the 1320 and is a blast to drive. It also has all of the options like A/C, power steering, brakes and yes, cruise control...
 

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Discussion Starter #3
Mad Max thanks for your reply

Ya I think I will just stick with the carb for this build. I have been there and done all that stuff before and I really don’t feel like getting into all that stuff for this truck. I may look and see if I can find an aftermarket TBI but so far they are up around 600cfm and that’s too much for the 3.4.

As for the transmission, I believe it was pulled from a 91 S-10 PU not sure, just don’t remember. I do believe it was a rebuilt because it had stenciling spray painted on the torque converter, either that or the torque converter has been changed. The flex plate does have a big weight welded onto it so it is a balanced flex plate. Not sure if I need the balanced one or non-balance one.


As for the engine, yes they do charge a $200 for a core which I do not have so will send them nothing back and $175 for shipping. So the cost would be $1740 for the motor. Now on the other hand I do not think I can build a 3.4 up here in Canada for that price. I would have to go out and buy an engine then tear it down and have it bored, crank turned, rods resized, heads rebuilt and all new parts. I have phoned a machine shop and asked just about rebuilding a set of heads and they wanted $500 just for that so I am sure by the time I would be done I would be into it for much more. So $1740 delivered is not a bad price. Other places on the net all want $1900 to $2300 plus deposit and shipping.


Yes I am thinking of just sticking with the v-belt system so I would like to just take everything off my 2.8 including the pan and switch it all over. I will go with an electric fan though. I am just trying to do a nice build without breaking the bank.


These trucks even once they are done up still are not worth a lot of money so I just don’t want to be spending 20 Grande on something that is only going to be worth 10. So far everything has cost me next to nothing. All the power stuff was free, power sunroof free and the parts that I have bought I have gotten good deals on them. I am doing all the paint and body work myself and interior work. The truck was free and so if I can get this all done for less than 8 Grande I will be happy camper.

Found some pictures of your truck, nice looking ride.


Bruce
 

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If you aren't using the tbi you can use a 2bbl weber on the tbi manifold,the edelbrock and holley is an expensive way to go unless you find one used at a bargain. I had a Weiand manifold/390,which in my opinion is a better manifold.The manifold is no longer in production but you might find a used one. I would go with the tbi or 2 bbl weber on the 3.4 it will be a sweet power plant.
 

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Until I read you are also in canada I was going to suggest going to the local GM dealership. They make a 3.4 replacement for S10s, but us Canadians get raped for some reason. I checked out a ZZ4 crate and it was over twice the US ads, and complete vortec heads were $1200 when they sold for $400/pr in the states. You could check it out tho, like eagleridgegm.com
 

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Awww..you ain't got shit!
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The 4bbl conversion is a good alternative to EFI. I personally think the Rochester doesn't do the 2.8 any favors, so I assume the same would be true for the 3.4. I do happen to have an intake and carburetor that I am wanting to part with should you be interested. Comes with all the cables etc, and my knowledge of the swap comes for free...

PM me for details.

I'd swap ALL the front cover stuff for later model serpentine. It's less drag on the motor, plus easier to work on. I put an electric fan on mine, so it's even less trouble. Funny...I swapped out the core support and put in a 92 grille. Most everyone thinks it's a later model truck till they see the old dash. Aside from the headers it looks stock from under the hood...
 

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Discussion Starter #7
Until I read you are also in canada I was going to suggest going to the local GM dealership. They make a 3.4 replacement for S10s, but us Canadians get raped for some reason. I checked out a ZZ4 crate and it was over twice the US ads, and complete vortec heads were $1200 when they sold for $400/pr in the states. You could check it out tho, like eagleridgegm.com
Ya we get burned big time up here in Canada. I have been buying my stuff out of the states for over 30 years now because it is way cheaper. The cheapest I have found and I called them was a place in Spokane for under $2000 delivered and that's including not returning a core.


Bruce
 

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Discussion Starter #8
The 4bbl conversion is a good alternative to EFI. I personally think the Rochester doesn't do the 2.8 any favors, so I assume the same would be true for the 3.4. I do happen to have an intake and carburetor that I am wanting to part with should you be interested. Comes with all the cables etc, and my knowledge of the swap comes for free...

PM me for details.

I'd swap ALL the front cover stuff for later model serpentine. It's less drag on the motor, plus easier to work on. I put an electric fan on mine, so it's even less trouble. Funny...I swapped out the core support and put in a 92 grille. Most everyone thinks it's a later model truck till they see the old dash. Aside from the headers it looks stock from under the hood...

I am out of town right now at a friends place. He has a few S-10 and jimmy's out back he is going to haul off to the scrap yard. I will go check them out and see if they have the serpentine on them or not.

As for the intake and carb I will get a hold of you when I get back home in a week or so.


Bruce
 

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Sounds good. I've had a lot of bites on it but no one has bought it yet. I'll give ya the whole kit and kaboodle for half what a new setup will cost ya with all the extras thrown in on top for free. Let me know.
 

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Boozebag
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If you go to Washington State, you may find a good used Camaro/Firebird 3.4 at a wrecker. I have priced a few and found all of them under $1000. If you go to a Upull, you may find an entire engine for around $200. The core charge is usually $35.
Of course, this will involve travel, and crossing the border with an engine in the back of a truck might be an issue, but you could save a bag of pesos.
I had a house in St. Stephen, New Brunswick and am sort of familiar with the border BS. They used to tax me for bringing beer across. Even worse, all of the Canadian beer outlets didn't have refrigerated beer.... :(
 

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NO COLD BEER! Blaspheme, Saskatchewan has the coldest beer in town, at the off sale. The reason I spec'd eagle is cuz they had an ad in performance plus mag from parts source that seemed cheaper.
 

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Sounds good. I've had a lot of bites on it but no one has bought it yet. I'll give ya the whole kit and kaboodle for half what a new setup will cost ya with all the extras thrown in on top for free. Let me know.
As soon as I get back home I will get a hold of you, I am interested in what you have.

Thanks
Bruce
 

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If you go to Washington State, you may find a good used Camaro/Firebird 3.4 at a wrecker. I have priced a few and found all of them under $1000. If you go to a Upull, you may find an entire engine for around $200. The core charge is usually $35.
Of course, this will involve travel, and crossing the border with an engine in the back of a truck might be an issue, but you could save a bag of pesos.
I had a house in St. Stephen, New Brunswick and am sort of familiar with the border BS. They used to tax me for bringing beer across. Even worse, all of the Canadian beer outlets didn't have refrigerated beer.... :(
Ya for many years you could not buy cold beer out of the Stores unless you bought from a bar for off sales. but now they have cold wine and beer stores all over the place.

I have checked around for a 3.4 to rebuild but what I have found is by the time I buy one even if I get it cheap it will cost me just about the same as to buy a create engine and I will not have to do all the running around. I am not one for just throwing rings in and grinding the valves, when I rebuild my engines I go top to bottom with all new parts. So with that and all the machining it adds up pretty fast. That still is not out of the question as of yet, just if I can not find a crate engine at a good price.

As for just buying a used engine and throwing it in that can be a crap shoot unless you really know the donor car.

Bruce
 

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Discussion Starter #14
NO COLD BEER! Blaspheme, Saskatchewan has the coldest beer in town, at the off sale. The reason I spec'd eagle is cuz they had an ad in performance plus mag from parts source that seemed cheaper.
Do you recall what they were selling their 3.4 for. I will give them a call when I get back home seems they are only 20 min from me



Thanks
Bruce
 

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I think it was around $1600, but then you have brand new, some engines aren't as good after a rebuild, idk about the 2.8/3.4 tho.
 

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As for just buying a used engine and throwing it in that can be a crap shoot unless you really know the donor car.

Bruce
I can attest to that. i did the swap not too long ago and the engine I got had some... issues. when I finally got it running, boy did it run.
 

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Just recently stumbled across this thread and it covers many of the same questions I have.

I was originally thinking about swapping in a 5.7 Vortec, but don't really want to drop every dollar I have into a truck I got free (thanks grandpa!) when I have other things to worry about such as food and student loans.

While it seems this is going to be the most cost-effective route to get more power from my 2.8 and increase it's reliability, I am still curious as to whether the small things like the gauges will still work the exact same. Sure I could mount up my GPS and use that as a speedometer, but that would drive me nuts.

Also, would the Rochester carb hold up decently if I do find a fuel injected engine and convert it? I know there are much better ones on the market, but that would be a tough pill to swallow for me at the moment.
 

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Awww..you ain't got shit!
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It's a bolt in...Open your hood. Look at your 2.8. Install the 3.4...look under your hood. Looks like the same damn motor...Mostly cause it is. Direct bolt in my friend. Same hook ups. Besides the transmission controls the speedo on truck anyway. Only caveat is that on the older girls like our 82-85 you need to put an electric 5lb max fuel pump on it. You can use the Rochester, but I wouldn't. It will really perform well with a Holley 390 carb or a Weber. The Weber is the easiest swap. An EFI conversion isn't TOO hard, but it can be frustrating. I did it on my 84. Lot of work but really well worth it....
 
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