I see the pattern of where they can break.
My question: IDT future breakage can be accurately predicted by HP alone. Exactly what factors are involved?
Actual maximum cylinder pressure at highest point too near TDC (like nitrous)
Very low rod ratio (4-1/2" stroke, BBC + .400" rod = 1.45:1)
Knock
Crank stiffness (worse with stroke increase, BBC rod journal)
B size mains (smaller crank, more saddle and cap area) vs. RB (bigger crank, smaller caps)

IIRC generally accepted that supercharged power is easier on the bottom end because the max cylinder pressure is less (than the same power NA) and occurs over a longer rotation period. But how much?