In a basic 440 that I am planning to have fully machined, start from scratch and "build" (not just re-ring a stock cast crank engine),
I'd rather go with a reworked stock forged crank if I can find a good one at reasonable cost.

Not because the cast crank will break (it won't) but because "built/fully machined" means it will be balanced too.

Personally I feel like I am cheating myself if we get all the components
weight matched including the rods end for end, and then kind of wimp out at the end of the process by hanging
a bunch of weight off the ends of the crankshaft because it's too light.

It's more "ease of internal balance + easy parts interchangeability that follows" rather than any concerns the cast crank is going to break.

However even if we're not machining much of anything, and we're not balancing anything either, we can still have some fun with a good old 440
regardless of what crankshaft is in it. https://board.moparts.org/ubbthreads/ubbthreads.php/topics/1235800/1.html