Recently I overhauled my 318 and in the process installed the 85-91 cast #302 heads, a comp cams H268 http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=619&sb=0, an Edelbrock performer intake, and an Edelbrock 500 cfm carb part number 1404. I've calculated the compression ratio to...