From what I have read, the M1 isn't setup to work with a 2 injector TBI system (which is what the DPFI pretty much is). So you would need to convert to MPFI, which can be done by swapping distributor, ECU, and intake manifold + tb, and some wiring. I've done a number of these conversions myself, but if you don't at least feel comfortable doing things like changing your oil or installing a car radio, I wouldn't suggest you attempt this conversion.
The write up above is good, but I should add that all the connections you needed were right at the ECU: constant power, ground, VSS and an injector.
Installed mine today in '88 CRX HF CA model. T tap connectors Pin A1 at ECU Brown (white connector top front wire brown on mine some are different color) for injector signal. Pin B16 (red/yellow on middle black connector) for speed sensor. Red to radio hot. GND to ground