[hunting4bear]

very good point ieatcamaros like i had mentioned on cam deferences in first post but duhhhhhh never gave it a thought of other way around for cam switches . and thanks from me for the little tid bit on head/deck bolts i will remember that and yup i agree the cast numbers telling the tail of a 78 block what what i see.
i wil file that little info away for future reference on quick telltail signs for 351