That motor should be a 350 horse Grand Prix motor. 10.5 with an 066 grind.
Many variables, cam choice, carb, intake and final compression.
If you want to run a blend of 93 and 104, 10.75 is fine. If it is at 9.1, leave it.
You can reasonably get 450 HP out of these motors with 670 heads.
But if 330 is your goal, as long as the heads have a fresh rebuild, carb and distributor are dialed in and the proper cam is installed, I see 300-330 HP at the crank with 9-1.
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.
