Uhh hi my names Chad and I've broke some stuff, the 451 in my Demon has been down twice since its build, first time not sure why it bent a rod but it did it was tight from get go. New builder and much free'er second time around had ran great then it wiped a cam lobe. It is down now being fixed. The cam lobe happened 5 years ago, someone told me it was likely an issue with removal of zinc. Was it but it's getting fixed finally. Hope it doesn't happen again.