Stop in for a cup of coffee

WV64Signet said
Good grief I hope not! But would not surprise me if there's something silly going on

Should be the same from firewall forward. I do have 64 production records from Windsor showing V8 numbers so should not require any changes

Some place I read the early As didn't have room for the v-8. First year with v-8 (which I don't remember what year that was) required firewall mods.