my friend is selling me his built 350 tpi engine from a 91 camaro( well the engine was from a 91 camaro but he put the engine in his s10 truck) any way what am i going to need to put this engine into my car? curently i have an 87 z28 with 305 tpi... im guessing i can keep the wiring harness?

 

yea, you can keep the harness and all.
It will need new and better injectors, a new PROM chip, and it would be a good idea to start getting upgraded runners, bases, and all. IIRC, you might have to change the manifold base a little, as I remember that the blocks changed somewhere in the TPI years, but your gonna have to get a second opinion on that.

But, just to let you know, all of the TPI systems were the same except the 350 had bigger injectors, in '89 (don't kill me if I don't get these dates right) they got rid of the 9th injector, and in '90 they went to SD systems. And, like I said earlier, the manifold bases changed slightly IIRC.