I have a 91 rs roller only thing missing is the motor and transmission, was originally a 305 tbi car. I want to take the motor and transmission out of a 96 gmc 1500 it's a 350 vortec is there anything I have to change out to make this work. I have both the wiring harness and computer for both vehicles.

 

You can use the TBI system originally equipped to your car. Your fuel pump should be swapped to one capable of a lil more pressure, you need a Vortec specific manifold, proper sensors and a chip tune, and I suggest upgrading your TBI some as you can read all about these things on numerous posts on this site.