This part was removed from a 1981 Galaxy 19' Boat w 5.7L OMC.  GM engine.  The drive model number is 800. These parts are in good - used condition unless otherwise stated.  This was used in a freshwater environment but has not been used in a couple of years - please see photos.

This is a: Good Used Loaded Cylinder Head - casting number: GM11, 376450 - there are two of these in the photos but the auction is only for one -   

Inventory Control No: R16L-OG013