Nice carb Kenth.
Those are getting difficult to obtain, and folks should know that it will replace 1973-74 Pontiac Super Duty 455 carburetors for the automatic transmission.
It will actually work for manual transmission as well, even though the part number for those is 17054911.
Good luck with the sale, I'll check the list in my shop and see if I have anyone looking for one of those.......Cliff