400 stroker or 440

The 400 has smaller mains. Less rotational friction. Plus with a higher piston pin piston, how ya think that 3.75 stroke fits, it has a shorter piston and skirt. The bore to stroke ratio is better than a 440. But since you already have the 440 why not pick up a 4.15 crank kit from 440 source for 2 k or less and build a 499 or 500 depending on bore. There's no replacement for displacement. Ag least on naturally aspirated motors. DD