how would i wire up a msd coil to the exsiting wiring for the extrenal coil

 

Dial into MSD's site. They have a tech-library for each part showing the diagrams for existing/MSD interface. Wrenchy

 

I have done this conversion. It is relatively easy. You just have to figure out how to keep the arc from jumping to the ground wire on the ignition coil from the rotor button. I used solder and heatshrink, but my shrink was bad. It misses excessively at 3200 RPM.

I can see the arc inside the clear cap, though. I know why it happened.

IT