This is a serpentine  belt drive from an 80's motorhome installed 454 Chevrolet engine.  Not sure how it all goes together or if this is complete.  Does not include water pump or second air pump.  The only number found is the one on the aluminum casting.  Check the pictures to see if this will work for you or if you've seen one before and can tell if its complete..  If picked up all goes with it.