I have been considering this swap for my 72 Valiant.What do you do for a ECM for aOBD1 setup? Plans are a centrifical (Novi 2000) with maybe an M1 setup.If so,I might be interested.
IMPORTANT:
If you run Forced Induction on OBD1 or OBD2 definitely run a wideband O2 sensor.
Honestly if you're going Forced Induction save yourself the headache and at least go OBD2. Tunes for OBD1 are approx. $600 from the few retailers that still do them. They are not very precise tunes and can't be edited down the road. If you stay at low boost levels 6-8 psi you can run OBD1 with an FMU, which is more of a band aid than a fix. Running it like this it will work, and you should be able to get 300-350RWHP give or take, but it's not the best way to do it. Also if you do go this route I would recommend just getting one of the Mopar performance ECM's for the right year engine/wiring harness, over reprogramming the stock unit.
For F.I. I recommend at least OBD2 because it can be dyno tuned using an SCT tuner. And the OBD2 electronics provide for a much more precise tune than anything available for OBD1.