I will agree with most of what Banshee has stated. Where will I diverge? There are quite a few people running 10.0(closer to stock) compression ratios on today's pump gas. Now I'll concede that the people running these are skilled at tuning their vehicles to ensure they don't have detonation.
Other sources for info includes the tech articles at Pontiac Street Performance.com, among them a great article on compression by Jim Hand.
1968 400 Coupe, verdoro green, black vinyl top 1968 400 Convertible, verdoro green, black top 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver)
