360 Advice Needed - Autocross / Street Engine Build

Ok, playing around with the calculator a bit:

If I kept the 0.032" quench, but shape the chamber out to 68cc (similar to other CNC heads, so the meat is there):
Static CR goes to 10.3 (vs 10.9)
DCR goes to 8.3 (vs 8.8)

Does that sounds like it's closer to a reasonable limit if I can keep it running cool?


As far as the track goes, the hard corner just after that main straight about 30mph, so lifting on that section really saves the brakes from cooking.

Most of the rest is about 80mph tops (hence the 3000-5000 rpm band), so similar to street driving.

The bottom end is fully balanced, and I should be able to redline around 6500rpm if it's still making power.