Hey Kegger. You have an engine in there now, or are you going to be sourcing the engine out of some other vehicle?
By "stock", the other guys mean that you need a 351 pan (302 won't fit) but one that came out of either a 4wd truck or a Fox-body car.
The Fox cars are not perfect matches for the Early Bronco pan, but they're close enough to work. Don't know if there was ever a 351 offered in one though, so if the pan on your engine now is not a rear sump, or sometimes a double-sump pan, and you can't find a pan in the junkyard, you can get conversion pans based on the EB pan from most of the Bronco vendors.
If you go aftermarket though, then the sky's the limit for what you can get, as long as it fits an EB with it's pan-smashing front differential.
Make sure to get the pickup that goes with whatever pan too, if you didn't already know that.
I'd agree with what Kyle said about the pump too. While I like the high-volume concept, and have used them in other engines, this engine family from Ford has it's share of sheared distributor shaft pins that would keep me away from one on my next build.
I've used them in Fords, and have not had a sheared pin yet, but there are quite a few threads here on the forums (though none lately that I recall) to give you the idea it's a real problem.
Good luck.
Paul