Mallory tech answer to coil/ballast ?

[BUBBAS IGNITION]

Trying to help ya here ........

Trying to help you here:
from above post

The MSD Blaster series coils ( # 8302,8303 etc) are designed for electronic ignition systems with current control, not for use with a point distributor.
They have a primary resistance of .7 ohms and draw high current. Even when used with a ballast they will draw excessive current causing the contacts to burn up pretty quick.
Thats the reason the coil is hot !! More than likely drawing 8 to 10 amps ...

You need a 1.5 ohm coil ( which you do not have ) and a ballast resistor of approx 1.5 ohms as well. This would drop 6 volts at the resistor and another 6 volts at the coil negative side allowing only a small amount of voltage ( mili volts) to travel thru the contacts.
You dont want 9 volts at the coil ( only when cranking) and it really isnt about voltage anyway, its the high current going thu the low resistance coil causing the coil to heat up.

Your question was why does my coil get hot????
The reason the coil gets so hot its the wrong coil for the application...