Installing main studs in my 348 I have an issue if anyone has had this before after installing the studs into the block it stops against the shoulder of the stud then putting the main cap on there is still shoulder above the main cap that even after installing the washer and then the nut it never contacts the washer, they are the ARP studs for big block Chevy that everyone says is compatible with 348 409 Motors what am I missing? Any help would be great thanks