Not sure if that's quite big enough cam to overcome 10.6:1+ with 91 octane.
The 416" I have: aluminum edelbrock heads, .040 quench, 274/280 dur (236/
[email protected]), with .502/.511 lift. I have 9.7:1 measured compression. It’s on the edge of detonation. On 95+ deg days up steep mountain it will...