Single or Dual Pattern Cam

...and once again, no one mentions that 67 to 69 and 83-ish to 91 are 9.2:1 compression from the factory (with the 83 and up LA roller blocks being pretty close to advertised) while the 71-ish to 83-ish are supposedly 8.8:1 but likely lower.

My guess would be putting in a factory replacement LA roller piston would get you more squeeze, although I don't know how much the closed chambered 302 heads accounted for.