I did my 440 the same way, back in 85, a lot of passes at the track. I might finally pull the pan this spring just to look.
If you think the big blocks are to small, check out a small block pipe. I made a new one up for the 340 from the 3.0 Mitsubishi engine (a full 1" ) attached off the cover into the rear sump Magnum pan. Has that nice bell on the bottom too.