you ever work on or race a 426 hemi / the drain back on them is far superior to a 440 .They have 3/8 ' (or so) drain back holes in the corners off the heads , straight to the oil pan area. I always chamfered the hole area in the corners on them and my sbc to create a funnel for faster flow. "Never " had an oiling problem on a
hemi ! 440 NOT SO MUCH.
