360 year differences

Hey, I just put in a search for the casting numbers of 360 blocks, and I have the same casting # as you, and a casting date of 9-28-77. It has dish pistons, but the dish looks shallower than other 360 pistons I've seen, and I have some heads that are 596's . They have the air injection hole. Does anyone know about this block casting, was it a good one? and as for my heads, what were the cc of the chambers?