I'm using a Canton road race pan with the front sump, baffles, and pick up. I think it holds 7 quarts when full. You can find some pretty good deals on them on ebay, but many others carry them- Summit, Jegs, Speedway, etc....
Why the high volume pump? You might want to check with an engine builder, but for the most part the consensus seems to be they aren't needed on the SBF motors and add a lot of strain on the distributor gear and
oil pump drive shaft.
Bob