I've heard that the oil pan pick-up tube from the 368 will not fit a 425/472/500.
Incorrect: a 368 pan and pickup are ideal. A 425 pan and pickup work, but the pan may not always clear the stroke. The 368 pan clears a 472 fine, and I'll soon find out if it clears the 500 without problems. It either case, the pickup stud must be moved from the 2nd main cap the the 3rd (center).