You could also put a hidden switch in the brown wire as sort of an antitheft device.
For someone who asked whether the MSD coil was hooked up to power, the coil is only hooked up to the MSD box. That is where the coil gets its energy, from the capacitor in the MSD box. The coil needs to be grounded, in order to have a complete circuit from coil thru distributor rotor, plug wires, plug, across the gap, into ground, back to coil..
