I'm getting ready to assemble my new 360, andwanting to know how much comp. ratio I can really get away with on 93 octane? It's a 360 +.030 w/K.B. flat tops, .020 in the hole. I'd like to deck the heads to gain some quench. The heads are ported X's w/ 69 cc's. Cam specs are 246 @ .050 , .539"...