I think I need a #920 head

I don't know the history of my car but I remember the prev. owner mentioning something about the car going to the northwest when the owner was in the service. May-be he blew it up and it had to be reconstructed. I wonder if either head is correct for the car. The block is #2465330 which is correct. The #315
head with the 66 intake bolts and bolt angle stumps me though. I will take apart the short block in the next few days and see what secrets are hiding there. Boy, the timing chain was loooooooose. I should have pulled the timing cover and replaced that bad boy but I knew I was going to rebuild it soon.
toolmanmike