Does anyone have any recommendations for switching out the engine?
Hi, there, Welcome to the Planet! What were you planning for your GM 2.8 V6? Is it shot or just needs things?
Since there are a number of variants in the 60-degree GM V6, you do have some options when it comes to engine replacement.
One is to rebuild your 2.8. You can easily turn it into a 3.1 by installing the crankshaft from a 3.1/3100/3.4/3400. The crankshafts from those engines are functionally the same and will plug right into the 2.8 block. The 3.1/3.4 have a longer stroke than a 2.8, so you get more displacement, and more power & torque. You'd also use 3.1 pistons, generally the ones you'd find in a '91 3.1 Rodeo or a '91 Camaro.
There are a few 3.1 complete engines that will plug right in, one is from a '91 4WD Rodeo or Isuzu Pickup. Another is from a GM FWD Minivan from the early '90's; Lumina APV, Olds Silhouette, Pontiac Trans Port. All of those had versions with a 3.1 V6, iron heads and a throttle body mounted atop the intake manifold (looks like a carburetor but ain't).
Last option, with some easy mods, is to mount a 3.4 out of a '93-'95 Camaro or Firebird. The 3.4 engine has a redesigned block with larger bores, and uses the "Stroker" crankshaft. This will give you a significant increase in power and torque. I have a 3.4 Camaro V6 in my '90 LS Trooper and with some performance mods, it's putting out well over 180hp. Runs out really nice!
The above engine mods & swaps are the simplest to do, because they're all within the same engine family. Swapping-in any other type of engine would be much more involved and would require a lot of fabrication and special wiring, etc.
If you stay within the 60-degree engine family, and have all your emissions controls working properly, any of those mods/swaps will pass smog. And when you pop the hood, it'll look completely stock to the uninformed eye.
Fill us in on your specific plans and I bet we can come up with just the right solution for you.
Cheers...........ed
p.s. Jerry is a wonderful resource for Isuzu parts, his email address is
[email protected]