MSD ignition and timing

My 340 10-1 93 octane, static compression 8.3 dynamic ratio, XS274S SFT cam, 904 transmission 8 3/4 410 gear. 27* initial, 34* mechanical, 45* vacuum advance at highway cruise. I spent a lot of time dialing in the carb and ignition curve to haul a$$. I'm also at sea level. Start conservative and run as much timing as you can without pinging.