i went to Pomona today and picked up a 3.50 open geared 3rd member for my car. i looked it over and it looks fine and functional and all. one issue though... it is a 28 spline unit and the yoke looks right to.... BUT there is no filler plug on it. the one on my car ( and the 70s rear end i have in the garage ) has the filler plug on the pig itself. im guessing the new one i bought had it on the housing? so heres the question.. can i tap a new bung on the pig or would it be better to tap and plug the housing? or am i screwed? hope not. sure i didnt spend alot on the pig, but still. more effort sucks.