Stockish 340 upgrades, cam needed
I've done some more calc's and am coming up right in the 9.9-10.1 compression zone with a .030 cut on the heads when including the overall piston head volume. The cam timing calculations show that the with the ICL of 106 degrees the intake closing is going to be very close to 62.5 degrees ABDC, The cranking compression at 2260 should be between 151-154 PSI and DCR should fall in between 7.9:1-8.1:1. This will help crutch the low velocity charge fill issue at and off of idle, but will be a little much with 91 octane under hard acceleration. But, with a probable static timing requirement of 32-34 degrees with the tight chambers and .038 quench, a slow mechanical advance curve should be able to control spark knock under load.