I am more confused than before now. That is an early Q-jet air horn but the number is totally wrong. It may be a custom built carb or re-stamped original 1968 400 carb. The part number search came up with these listings but again, that number is totally wrong for 1968. It should start as 702. 17054905 carb 17054905 carb Show a pic of the choke side. If it has a divorced choke then it is a '65 to '72 carb. I just don't get that part number.