Distributor gears Ford part number for 351C/351M/400/429/460 engines this is a steel gear from Ford M-12390-J bronze M-12390-H cast iron M-12390-G these are all for the 351C and so on 351W /302 use part number steel M-12390-F bronze M-12390-E cast ironn M-12390-D hope this helps you guys. Bob 1710