zz4 or not
I just purchased a so-called zz4 short block partial engine on ebay. I am not sure if it is a real zz4. The back of the block has a 10243880 casting number. The front (where the alternater goes &where the head meets the block) says 1M0424 under that it says 3P04. I thought it should say zz4. Any help with this would be GREATLY appreciated!