Plenty of people are running engines today at high 9 low 10 compression ratios on premium gas(93 here in Texas). The recipe generally includes zero deck height between 0.035 and 0.045 quench height and an appropriate cam. Is it the 068 cam or the 744 cam that you have?
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)
