Would there be interest in a dodge TBI setup made for our cars?

Not me. If I were doing a from-scratch buildup and investing the time and $$$ in a ready-built, custom system, in that case it would definitely be port fuel injection and not TBI. The attraction of TBI is that it's an inexpensive way of stepping away from a carburetor, that doesn't require extensive engine hard-part mods. That advantage goes away if we're talking about doing a complete buildup and paying big bucks for an off-the-shelf system.