[Jack21]

Ford castig numbers/letters are under where the starter bolts in.

The first two digits of virtually all Ford parts indicate the year of the vehicle it was on, or made for. The first digit is a letter, B, C, D, E, indicating the decade. C='60's, D='70's, E=80's, etc. The second digit is the year.

Look under the starter for a block casting number. If the first two digits are C9, it's a '69. If D2, it's a '72, etc.