372or 416 and why

rumbles right about the rod ratio, it will decrease with the increase in stroke given the rod's length stays the same.
Which means more rod angularity/side load/friction/heat=chevy.lol

But then at 4' stroke that piston gets pretty light, and a light weight piston is a good thing.
And though it will take more cam duration for instance
if it was 284*stock stroke=65-6800rpm +/-
now it will be stroker 300*=65-6800rpm+/-
mopar heads flow good enough to work with upscaled builds such as these.
Yep shy on port volume, but a lot to work with and in the right places a lot to remove material wise 'wink wink'.

If you wanna rev this thing 7000+ rpm and have gears to make it useful to you where ever you may drive it then the 372[steel crank of corse]

If you wanna keep the rpms below 68-7000rpm and even with not so great gears have the power still be useful 416.

If you have all the money in the world to purchase race block, w9 heads, solid roller cam, callies crank and rods, weisco pistons and yadda yadda yadda and are going to rev to the moons boarder, say hi to the martians for me, and of corse in this case you'll have a 6 speed so no worry there then still go 416 .lol