first, I did a search but could not find anything, I'm looking to make a spare 2.8 a stroker motor, what 3.1 crankshaft and pistons will work, this is for a 85 camaro 2.8 motor.

 

Suprised you didn't find anything, this has been brought up many times. You need to look for a 3.1 crank without the reluctor wheel cast into the crank. I have no idea what years may have had them but I'd look at '90 3.1's and get the flexplate & harmonic balancer with it. Pistons from the same motor will work, but you can mill the 2.8 pistons to fit for a little more compression.

 

I am assuming it needs to be a rwd, not fwd crank, plus i did find somethings, I was just wondering which particular vehicles it was in.

 

go to ebay and put in 2.8 stroker kit...there is a kit there thats pistons ,rods,bearings the works

 

You can find them in camaros/firebirds and fwd cars. Like I said I have no idea which specific cars had the non-dis cranks because only a limited number were made and used more or less randomly.