[COPO]

The block date would not be correct for any '69 Camaros because it is so late. Are you sure it is not a 454 block? The 512's later became 454 blocks. I'm going from memory here, but check the bottom on the cylinders for notches as I think only 454 blcoks had these. The notches allowed the rods to clear the cylinders w/the longer 454 stroke. Dimensionally the 454 and 427 blocks are the same, just different stroke cranks. There was one on EBAY recently that was bid to ~$650. So Joe C's advise is right on. These blocks could be purchased as a short block or long block assembly. Looks like yours was a short block and someone already had a set of BB heads for it. There's no way those heads were factory assembled on your short block.