Just my opinion, no wars wanted.
Depending upon rod length to stroke ratio, the first damaging harmonics(minor), on a 50 % (standard) balance job, with no overbalance condition, occurs a 3300-3500 rpm, second and more severe(major) phasing @ ~ 6800. This is a product of a steel crank "winding & un-winding" down it length, while spinning in the Block, and the staggered counterweight location(not perfect).
When related to "torsional stress" on the crank from a "relatively" abrupt increase in cylinder pressure,(nitrous), because the piston moves farther in the bore in the first 90 degrees of crank rotation from TDC, than in the second 90 degrees to BDC, due to main placement, damaging harmonics, or increased torsional stress on the crank would be more severe proportionally to the longer rod ratio engines, as opposed to the "shorter stuff's" ability to get the piston "outa the way" quicker,(dwell time). That said, the longer stuff will extract more from the burn(for lack of a better term), with the higher dwell time.
Just my opinion, but the very characteristics of our beloved mopars, that make 'em great revvers dimensionally in the bottom end,(other than the heavy bobweights), also make 'em more susceptible to cracked cranks under 'abrupt" nitrous loads, as opposed to boost increase(slower).
I think the manufacturers, generally, have recognized this also, with the evolution of the newer engines over the last 30 yrs going to the more common lower ratios and cast cranks(cheaper), even accepting increased cylinder wear as "OK" for a timed useable lifespan. "planned obsolescence" really.
(4.6 & 5.4 modular fords being more exceptions than the norm by "packing" the crank counterweight lenth together closer)
Like I said, no wars wanted, I'm an old Fart ! just my opinion.
