Hello,
I took apart my engine heads yesterday, and I saw that the heads casting number read 1479831. I believe this is either for 390 or 429 heads from 60-67. My block says 1471320, and the stamp matches my Vin, which is 58M017493. I can't find any information on the 1471320, I am guessing since the stamp matches my Vin it's a 365. If anyone could help me, with the info on the casting the number on the block that would be awesome.