I just picked up a Caddy mill and Im not sure if its a 472 or a 500.. The guy I got it off of pulled it out of a Chevy truck so he had no clue what it came out of... The block casting #s are (from what I can tell) 1486288 and then there was a stamped # again (from what I can tell) 613884, So if someone could please atleast find out what year this anchor is that would be great..

Thanks
Harmon