Cadillac periodically put out Master Parts Books, then send addendums in successive years. The 1965 Master Parts Book is the one I find most accurate if looking at what originally came on these Cadillacs. 1969 was a another major distribution year. You can usually find the Cadillac Master Parts books on eBay and elsewhere in original print form, reprint form or digital PDF form on CD. These will include the AC Delco parts and everything else. If you want AC Delco only parts book, I am not familiar with anything like that. I did a couple search on eBay for 1964 Master Parts Book; 1964 Master Parts List; 1965 Master Parts Book, 1965 Master Parts list and came up with quite a few hits. I saw a digital copy of the 1965 Master Parts Book for $28.