Anyone know the best way to ID a 351w vs. a 302 roller block. I bought a project car (64 Falcon pro street). It's one these projects that has changed hands a bunch, and I don't have much info on it. I need to replace the oil pan, and it has a rear sump pan to allow clearance for a MII rack. I can't find a rear sump for a 302, and thought it could be a 351w. I'm finding lot's of rear sump pans for the 351w. It is a true rear sump, not like a late model stang with the dual sump pan. Any help would be appreciated. Thanks!