What tti does not make

Just called TTI and Hedman. They do not make a header for a 1966 Barracuda with W2 heads. Hooker doesn't show one either.

Guy at TTI said cutting the flange off and welding a W2 flange will not work. He says the oval port on the flange wont match the exhaust tubes. For a shade tree guy like myself that sounds like b.s. as long as a 3/8 W2 flange is welded back on.

If that is true couldn't I just buy a 1-5/8" oval port W2 flange (Shoenfeld has them) and open it up to fit a larger header tube diameter?