Im not sure if I am gonna use the stock manifolds or not. I read somewhere that the F body manifolds fit well with slight modifications. Ive been busy trying to modify the harness. I got alot of good informaiton, also the PCM flashed, from
www.LT1swap.com. He only charged me $75.00 to remove the vats, emission stuff, and add elec fan controls to the PCM.