Right now is the stand alone dist. MSD 8388 Ready to run. The ballast is bypassed using a 10 gauge jumper wire connecting the run and crank wires like the one for a FABO ignition. 12 volts supplied by these wires to the positive side of coil, red MSD to the positive side, orange to the negative side and black to ground (valve cover bolt). The Mallory's were stand alone also.