Installed and running. Had to change flywheel. Guy I bought it cheap from had wrong flywheel on it. Think he didn't realize because I got it cheap. Mid year change for 1979 on up to externally balanced. Wish I had checked before i had to have my boy take transmission back out to change it. Gets 45 lbs oil pressure hot and does not smoke. Paid $600 for this with core C6, 429 core and 2 good doors