383 bb ?? pros and cons

383's are great and when it comes to running stock motors the 383 has the cylinder pressure the 400 doesn't, the 400cid has a bigger bore, lower compression and cast iron crankshaft while the 383 has steel crank [till71-72]

Hey hemis have a 4.25 bore just like 383's....so bore is not the main concern.

all above very true! The 383 becomes a 426 with the 440 crank. Nice! A 426 Wedge engine! Or in the 400, a 451. Overbore dependent of course.

It's a shame the 400's never made it into the performance era with a decent piston, cam etc.... The cast crank will hold well and under a street rides build, I can not see an issue at all.