I think Woodz428 hit it on the head. I have seen a couple of 1966 Shelby Gt-350s with a 3 two intake on them and I was told that they were installed at SAI, but I am not at all sure this was the case. I don't know if Ford would install them from the factory special order or not, but remember back in those days you could get almost anything if you specified it in the order. Since yours has Ford stamped on it, then it mush have came from Ford. I did see a 1965 Shelby GT-350 that a guy here ordered and he ordered it with the Webbers and that is the way it was delivered from SAI. I don't believe that Ford made any dual intakes for the 351W, but I am not sure.
Ron
