Quote:
Originally Posted by b-man
Here’s the specs on the H-O Racing VS-11 springs I used on the 9770716 heads original to my ‘64 421 HO. I’m sure anything close would be fine.
Note that the shorter 1.530” installed height of the ‘64 and earlier heads adds a little extra tension. These springs probably on the more conservative side, but I’d say plenty for the RPM range of the 068 cam.
I was running the VS-12 springs (1.71” installed height) on my 455 HO with a .550” lift cam, those springs spec out at only 126 lbs on the seat and 267 lbs at .500” lift and that engine would spin to 6k easily. The guys at H-O Racing certainly knew what they were doing.
|
Yes, they did, Bart. Ken Crocie was a godsend when I was building my first Pontiac 34 years ago. He and Nunzi kept me from making many rookie mistakes.