My engine specs are a 460cc with an ARC billet rod and flywheel, 7cc dished piston, jeremy Parsons ported head milled .080 with 40/33mm valves, 65# springs, 1.2 ratio Gage roller rocker arms, .307 lift 260 duration cam from NR, serpentine header, and a 34mm Mike Clements carb. I have a 4 disk...