I know this might be branded a heretic for this suggestion, but why not look in the Ford direction. The 3.8 V6 in the Fox body LTD's and TBirds used a 2 injector TBI setup. I believe it used a 2bbl Holley mounting flange. Another one to consider may be the 84-87 Tempos and 4 Cylinder Taurus with the CFI injection. They had a single injector setup that mounted to the manifold with 2 bolts, similar to a 1 bbl carb. The fuel pressure regulator was integral to the throttle body also. It may be on a 4 cylinder car, but I don't see any reason it wouldn't work on a relatively stock 235. Instead of using a factory tune, It would probably be really simple to use something like a MegaSquirt to adjust the pulse width and ignition timing.
