MSD Ignition / Ballast Resistor

"-Just bypass the coil resistor, take the old coil+ wire and connect that to the small red on the box.

-Blue and brown wire at ballast, tie together to feed you small red wire on MSD"
Normally either of the above. Someone has put the incorrect ballast in your car, which is actually "fine" because one side of the 4 terminal ballast (for electronic igntiion) does the same job as the "only" 2 terminal resistor.

The easiest way likey is to jumper all the wires on the ballast together. You can even do this by buying a couple of male flag terminals and making a short jumper wire. Then take your old coil wire and connect it to the small MSD red.

WHY Because on the resistor, one side is the switched 12V feed coming from the ignition switch. The other two wires, one of which goes to coil+. The remaining wire spliced in on the coil wire is the "bypass" circuit

The 12v from the key goes DEAD during starting (cranking). The coil power is supplied by the bypass cirucuit which comes from the brown wire spliced in with the coil+ wire. This brown also comes from the ignition switch on a separate contact. It is ONLY hot during cranking

So you have to have those connected together with any system not using the ballast.

ALSO DO NOT connect ANYTHING to the coil EXCEPT the two MSD wires. NOTHING. Not a tach, and not the radio surpression capacitor originally connected.