anyone running an msd blaster coil with a tach??

Interesting. thanks for the diagrams. I will give it a try. I have a 6A box that came with the car.

I hooked the green wire from the tach to the negative side of the coil as per the instructions, but they did say some aftermarket Ig systems may not operate properly, so an adaptor may be required or the ground may need to come from the battery.

The tach install seemed straight forward, but I have never dealt with MSD before only the factory stuff. I learn stuff everyday. :) thanks