OT rant about keeping '77 B200 camper on the road; then a fuel filler question

I'm thinking your compression is at just under 140 psi. A 9.3 Scr might get you 158 psi, and a huge increase in take-off power, in the neighborhood of 12%. That might not sound like a lot, but it is better than the equivalent increase in rear gear, or like 4.00s in place of the 3.55s.
Old news I know, so how about an increase in stall speed. You'd be looking at an increase of the same percent; ie from 2200 to 2500. That would cover the compression issue. A 2800 might let you spin the tires,lol. Actually that's not quite true; IE you'd be looking to find a stall-rpm where the torque is 12% higher, Say your 360 is putting out 230ftlbs at your current stall, then you'd be looking for 258 ftlbs as the new torque at stall. It might be 2500. IDK, or it might be at 2600 IDK. And the 230 number I just picked out of a hat, looking at the TQ, the tire size, and the power loss thru the powertrain, and assuming the TQ will not make any more torque at the current stall, with or without the secondaries opening........and the complete lack of tirespin. I just used it as an example.