isuzu trooper 2.8 to 3.1

[trooperv6]

hi everyone
i just bought an isuzu trooper (very, very cheap) with a bad 2.8. it is my understanding that the engine is made by gm, the only difference being the starter on the driver's side.
my question(s) are: im going to rebuild the engine from the block up, and i've heard that you can stroke the 2.8 with a 3.1 crank and rods. what pistons do i use?? i'm not interested in turbo-ing or anything of that sort. anyone know what years of 3.1 stuff i can use?? i'd also like to put a mild cam in it. which one would give me the best everyday performace without messing up the emissions/computer? (it is a TBI system, with a pre-OBD computer)
thanks in advance for your imput
tom

[sharkey]

to make your 2.8l a 3.1l all you need is the 3.1l crank and 3.1l rwd pistons (fwd pistons would be for aluminum head, rwd pistons would be from a 90-92 camaro/firebird 3.1l). the conecting rods are the same in both motors.

there are a lot of cams out there, about the biggest you can go without computer tuning is a comp 260h, although it may not be the best choice if you plan to offroad the thing.

[trooperv6]

pistons

where's the best (and cheapest) place to get the pistons? the block's definitely going to have to be bored over, so i can't use standard size out of something else. (not that i would anyway!) does .106" deep recess on the piston head sound right? the 2.8 pistons are flat. i know the 3.1 pistons have to be shorter or recessed (or both) to keep the compression ratio under 9:1, but i just want to be sure.


thanks for the info

[forcecop]

What would be a good choice for off-roading?