I also ran their HC03 in a roundport 455 with normal lifters. Never an issue with vacuum.
Sent from my LG-G710 using Tapatalk
__________________
1972 HO Trans Am auto White/white
1974 SD Trans Am 4 spd, no a/c dk blue/ white & blue
1978 Trans am gold/ black ,T56, t tops, EFI 474,
Build: http://www.pro-touring.com/showthrea...1978+g+machine
1999 30th Trans Am 6 spd, T top
|