how much cam with performer rpm heads?

For my combo, 11.5 TRW's, (ha ha!) 906s at 88 cc's, roughly .050 down the hole, I've got around 10.5 to one. It'll run on pump 91, but I sweeten with 100LL Avgas, cause I can
The swap to 75cc rpm's will bump the compression 1.25 points, so an avgas mix will become mandatory. I'm running a .557 purple shaft so I can do an A-B head swap test. With sloppy factory adjustable rocker ratio and lash, if it's really moving the valves .525 I'll be surprised.
Edit: forgot to mention, a 440.