You can find out what engine (block) is in it quite easily. There is a pad in front of the engine on the pass side where the head sits on the block. Just clean it off and you'll see numbers and letters. An example would be 0217PHL. This would decipher as being built on Feb 17 and would be a 350 4 bolt main motor from a 84-93. My friend has this block in his '73 Nova so I know what this particular block is. There are a ton of websites that you can search to decipher what block is really in his car. Happy searching
