I would actually love to see a back to back dyno run to see if a hv pump costs hp over a stock pump as some claim. I'd be really interested in seeing the real-world difference on a 440 with stock type bearings.

I ran 440source heads with a hv pump and never had a problem with oil drainback or oil pressure, however I did have a 7 quart pan, which IMO is a good idea on any engine that will see some rpm. Extra oil capacity is never a bad thing, aside from the pan clearance issues anyway!