[Lorenfb]

"Long wire runs cause voltage input drops and the output
spark signal (450 volts plus) can cause mis-fires and electrical
interference."

1. The MSD inverter draws a fair amount of current which can result
in an input voltage less the desirable if an improper gauge wire is used.
2. The long run of the coil switching voltage (+450) can interfere
with the trigger signal, tach wire or other electronics, e.g. voltage
regulators.