I've always heard a factory 400 slug will work with a 440 6.76 rod and a 4.15 crank in a .022 overbored 440 block......bobweight will be heavy but no heavier than a stock 440!

Ohio and I think maybe Eagle makes a mopar journal 4.25 and doesn't MuscleMotors use one too?

the 2.200 with chevy ~2.05" length journals has become the much more popular way to go but hte Mopar sized stuff is likely still around.