I'd go back and reuse old unit. You live in Vegas (I'm L.A. Ca.) and one time driving around I stumbled on a shop that works on old cars. I big place west of the strip just either direction of Flamingo if I recall. If you know the place I'm talking about stop in and see if they can direct you to carb shop. By the way, they have a cut away of a Y Block in the lobby. Edit, It's permanently closed. Lost in the 50's Automotive was the name.