Cab I had 11.8 in my 511 with just about the same cam as what you have. I had 190 psi cranking compression and .042 quench. Ran just fine on pump gas. The cam was 291/293 advertised, 263/265 @ 050 631/631 lift. I had indy sr heads. It would run 6.60s @ 112.4 with 3.23 gears in the 1/8th. I freshened up the motor at the end of the season and put flattops in it gave me 13.0 to 1 and went 6.45 @ 113.95 mph on 110 race gas. I would think you would be fine with that. Did you add 15 degress to the 050 timing for your dynamic compression ratio?. I use that calculator all the time for building a pump gas motor.