Actually the stock cores vary but 114and 110 are the norm. I know where a pallet load are waiting to be ground for a major mopar performance parts supplier. Yep,I grew up in the Memphis area and know Harold having spent time with him in the UD time period. I cannot get any cam company to do what you had done to a cast core(WONDER WHY?), I bet they wouldn't go that far with a billet core either LOL