run it off the p28
you don't need to change any of the electronics... dizzzy, alt, injectors... but you will have to swap the plugs from the cx or z6 harness to make it work. simply cut, paste, solder, tape.
then, you need to buy and run the 4 wire o2, as your CX is a 1 wire and will not work.
if you can score a z6 harness for cheap, likek 20-40 bucks, i say pick it up. it might be hard to come by though. otherwise, its not that hard.... just gotta do some soldering.