Turk,
The MSD box puts out lots of amps from the big capacitor in it, and goes directly to the coil. I would check the size of the factory wire or suggest not using it and running the 2 MSD coil wires directly to the coil. NO other wires should be attatched to the coil. The tach lead is picked up at the msd box. Also if you run the white wire (from the msd box) through a hidden toggle switch to ground, you have a 'kill' switch and nobody can start your cobra but you.
Good luck,
Perry.
