I too will be putting a mag360 with OBDII and overdrive trans in my 1973 dart sport some time this year. I will be making my own wiring harness. I am going to see if I can use the computer to run aftermarket gages. Like engine temp, oil pressure etc. Sorry if it has already been asked, but did you have to get the computer reflashed after you deleted all the emission wiring? are you running the down stream 02 sensor? I would like to run headers on mine. thanks Mopar65