[bdriver]

lanmanager - Good point - the marking that I was referring to were on the heads not on the block - assuming they were on a 427 - that would make it what I outlined.

As for how you got them on a 1967 boat - you would have to answer that one - please keep in mind they are your pictures.

Picture shows C8AE-H on the heads - I am assuming that you have them on a 427 - these head might equally be 390/428 heads.

On the heads, C8AE-H were also used on 360’s and 428’s but once they are removed they all become 428 heads.