Stirring up a hornets nest

for the sake of conversation, would not the " feel of your pants" power, which we are talking here, NOT racing...... would it not be pretty similar between all these SB. the difference we would get ( assuming the same condition, similar compressions, cam of each engine), be in rear gears, distributor curve, tune of carb. and perhaps the ratios of the trans????? ...

Yes, You can not convince me that 20 cu in will make much difference "equalizing" as you have said. Racing is a whole different animal. Ability to tune alone, can put a 318 over a 360 given the right combination.