serious inquiries should include phone #. have both styles, small and large diameter hole for hub on end of crank. for pontiac motors only, will not fit GM corporate motor even if it did come in a car called pontiac. click "more ads by this user" to view more parts. no phone # no response from me. I dont do text or email. gto, lemans, trans am, firebird,formula, grand prix, bonneville, catalina,