VINs are not stamped on the body, motor, trans, or fender tag in '68 and earlier. This started in '69. The number you are thinking is a sequence number, which would be the last 6 of the VIN, is called a shipping order number.
Thanks for everybody's input. The stamp on the core support is 9 digits. Letter, #, letter, 6 #'s. Does that sound right for a 69? Are the first 3 in sequence with the VIN? I seem to recall hearing they were reversed.
Thanks to all.