What makes using OBD2 system, so much better than OBD1

If you have used the megasquirt systems check in with Matt Cramer at DIY autotune. There are a few guys who supposedly got a controler working for the RE trans.
You may have to use this to work though.
DNJ-DCF1
Read this for explanation on operation.

Chrysler 47RE info - MSgpio.com read only forums (Jan.15,2018)
Don't want to use MS again