I have a 98 sierra with 5 speed vortec 4.3 and my friend is geting an 80s(i think) Chevy van with a 350 with 60k. From what I understand the 350 will bolt up to the transmission but will the mounts be the same or just use the 350 ones? Or will I need special ones?

its carburated so the wiring should be easy?

I can handle fabing up the exhaust.