I was thinking about clamping the intake manifold in the Bridgeport and milling it to accept a small base Rochester 2G.
Mercruiser Marine used to use 230/250/292 engines with some of their bigger outdrive units, and those engines ran a Rochester 2-bbl. carb. Do a little shopping around boat repair shops, and you can probably find one of those manifolds. They also used a nice-looking cast aluminum valve cover.
Jerry