Man there is alot of conflicting answers here

First things first

1) You guys do realize the MSD Blaster 2 Coils that most of us buy (8200-8202-8203)coil already has .7 ohms of resistance built into the primary side
2) You guys do realize the (8200-8203)coil that has the supplied ballast resistor of .8 ohms is to bee used only with POINTS STYLE IGNITION SYSTEMS

BALLAST RESISTOR IS NOT NEEDED WITH THE MOPAR ELECTRONIC IGNITION because the coil already has a .7 ohm resistance built in !!!

So adding the Mopar .25 ohm resistor to this or the supplied .8 ohm ballast resistor = Total of .95 ohms or 1.5 ohms of resistance to the positive side of coil




Note: This Blaster Coil is supplied with a ballast resistor. If your application uses a points
distributor, the ballast must be used. Late model ELECTRONIC IGNITIONS or an MSD
Ignition DO NOT REQUIRE the ballast resistor.

Note: The Blaster Coil will mount in most factory canister coil mounts. MSD also offers a Chrome Bracket, PN 8213. It is recommended to mount the coil in an upright position.
STOCK POINTS IGNITION
If you are installing the Blaster Coil with the STOCK POINTS IGNITION (Figure 1), MSD Blaster Ignition or an MSD 5 Ignition Control (Figure 2), the supplied 0.8 ohm ballast resistor must be installed on the coil positive (+) wire.