ok i have a clean title on a 1991 RS with the tbi 305 and im gettin a donor car thats a 87 iroc z z28 no title but i dont know if the tpi is a 350 or 305 and i cant get to the number right now does anyone know if i can get that info from the vin numbers also would the finders and stuff from the body match up?

 

8th character of the VIN:
F = 305 TPI
8 = 350 TPI

That only tells you what the factory put in the car, not what it has in it now.

Do you mean fenders match up?

 

ok ty its has the F
and yes well the fenders match up / hood

how about the t-tops as well

 

Its sad the 87 iroc has 71k miles but I don't wanna fight for a title

but do i need to pull the wiring harness and ecm for the tpi as well

 

I did what you are talking about about 2 years ago, I took a 92 305 tbi RS and put a 355TPI motor in it and maintined the T5, the motor (TPI) was out of a 87 IROC, so I found a speed density TPI set up for a 91 or 92 Z28/TA 5 speed, put the SD TPI on the 87 motor used the SD TPI harness and ECM plugged it in to bulkhead and 207 under the dash and it fired right up, the only thing I had to change was the speedo pinout on the bulkhead everything else worked fine! But the 87 harness will not work like that, there are alot of differences, too many. Find a speed density set up of buy one with the harness and ecm, that's the best and cheapest way, IMO.

 

now i do have the whole 87 iroc z so i can take what ever i need outta it