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

I too have lived with a Dodge TBI- for many years on my 90 4 X 4 3/4 ton. I've replaced the actual injectors several times. Ones for a 318 make a 360 run like crap and don't be surprised if they give them to you represented as the right ones. As stated above the computers themselves are very primitive, suspect at best, and replacing one is a bigger crapshoot then replacing the injectors. I don't need to mention how difficult it is just finding replacement parts- computers, parts of computers, and sensors for one that has gone gunnybag.
It can't flow enough air to allow a working 360 to do it's job without dogging (it's not as bad as being passed by a bicycle while going up a hill in a dump truck I once drove, but still not much fun pulling a loaded car trailer up just about any grade), and the fuel economy has never been anything to write home about. On a positive note, the damn thing aways seems to start, even if it runs like crap.
Bottom line is it's basically a glorified electronic carburetor and still retains most of the short comings of one. While the actual throttle bodies are all very similar to one another, OEM throttle body computers are primitive and not well suited to running on something other than what they came on and newer aftermarket systems are very nearly or the same expense as a port system.
With port injection having been the standard with virtually every manufacturer for around 20 years now, if you don't want the expense of buying all new components, adapting to a junkyarded port injection isn't much different from throttle body aside from the extra time and trouble to deal with injector bungs, fuel rails, and the somewhat more complicated wiring harnesses needed for a port injection system. Chances are better for finding a suitable computer to run it on your particular engine too. If I was going to go to the trouble of adapting to EFI, I'd be far more inclined to go with port injection verses throttle body. More work perhaps, but not terribly different in cost if you are junkyard savy, and far more satifying in the end result.