The compression is 7.8-1, the cam is a summit house cam with 218/228@.050. 4spd. The A/F ratio at WOT is 10.8-10.9-1, 20 degrees timing. Stock 318 heads, 360 CI manifolds. The heads are the cork in the system. I ve never hurt it on 91 octane. It's never had a problem on 87 octane as long as I kept it under 18lbs. of boost. At 18lbs. With the stock cam it made 460hp. Dave
