ive never done a top swap, i though you swaped over the l67 heads up and left the NA block. im just trying to get a better understanding not sound like i know what im talking about
The heads, in the mechanicale aspect are the same. Only thing different is the port for the injectors. So your Pushrods, lifters, open the valves just as far as they would with the N/A heads.
1997 Grand prix GT Black Coupe- The beater
1998 Grand prix GT Black coupe- Top swapped, XP cam
2008 Grand prix Midnight blue- The slow but nice car
1999 Chevrolet Silverado red ext. Cab