[sllib]

hound dog;
As near as I can tell from the gibberish in my Ford parts book ("Ford Engine Parts Interchange")you have a 351W built betwwen 1971 and '74 (D4AE-AA) but there is supposed to be a alphanumeric number like 4A18 (Jan. 18, 1974) that you didn't give us. Since the deck height changed in '74 you need that number. At least that's the way I read it. I hope this helps.
Bill S.