I would try running a zx e12-80 equiped distributor. You'd have a self contained ignition system. You'd only need the distributor, coil, and a 12v power source. I ran this setup in my 74z, but it was a manual trans. As far as bypassing the module in the footwell, I would remove it and test the wires for a "hot" 12v source and cap them off to prevent any shorts.