M1 SP vs Air Gap

Hope I am not highjacking the thread, not my intention, Moparmal!

I would have though mine would rev higher as well, but I'm lacking cam from what I've been told. I played aroung with shift point, launch rpm and timing, and found the best combo (with old TCI 3000 stall and Holley 750) was 5300, 1500 and stab, and 30 degrees total timing @ 2800. My car weighs 3400 w/o driver. The guy that sold me the heads ran 11.20 with slicks and 10.7:1 comp, 248/249 and .577 cam, and an empty weight of 3150 and 32 degrees timing.