[markjohnson]

I agree, leave the headers on. I think I've mentioned this before but a friend on mine has a bone stock, never opened, stock cam,intake,carb etc. 1970 LT-1 out of a '70 Z-28 that was wrecked very early in it's life. He's had this motor for like over 30 years in his Corvette. He recently yanked it out and put the engine into his son's '69 Camaro with a four speed, 4.11's, and some small nine inch slicks. The car runs 12:30's and this motor is even a little tired after so many years of street driving. Those times say alot about the performance potential of that engine. That's Rat motor territory!