what i have found, after breaking a snout, is the top mounting hole in the starter is made for a 1/2" fastener vs a stock (big block) 7/16" fastener. the starter index's on the snout and with the loose fitting top bolt hole and some starter kick back the snout cracks. since then, i put a sleeve in the top hole to accommodate the 7'16" bolt and that keeps the starter located. no more broken snouts. another option would be a stepped stud for the top hole; 1/2" to 7/16".