Stockish 340 upgrades, cam needed

711451-08. Four degrees advance ground in cam. The intake closing is coming in at 59-1/2 degrees, so no more than 9.8:1 with the small port heads on 91 octane, and could go as low as 9.5:1 without significant torque loss to get the car moving.
9.8:1 yields a DCR of 8.1:1 and 155 PSI cranking compression, right at the practical limit of 91 octane. Going together with 65 cc heads and close to 9 cc of piston head volume including the ring gap and the .052 thick 12.5 cc neighborhood gaskets gives right at 9.5:1. This gives a comfortable DCR of 7.8:1 and about 147 PSI cranking compression. That will allow a good performance mechanical advance rate and allow for the maximum static timing.