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

thats an advantage with factory TBI from dodge is that it has a 4 wire o2 sensor so it could be placed a little futher back

The O2 sensor, heated or no, really wants to be as close as possible to the exhaust ports. And that's not an advantage to the factory Dodge truck/van TBI; the GM system has a heated O2S as well.

speaking of GM wiring I have access to one GM TBI unit from a 305 could you provide a good wiring diagram for them?

I'm afraid I can't. You'd need to look at a factory service manual or subscribe to something like alldatadiy.com .