So I installed an MSD 6AL on my 79 Spider... after the install, I cannot get the Tach to work... Have any of you installed this ignition box on your car? Did it require an adapter of some sort?
Before this upgrade, I installed high supression plug wires and new plugs... the tach connection comes off of the 6AL box itself since going from the positive side of the coil with this thing installed would probably blow the tach...
I am not positive that I have the magnetic pick-up wired up right... I wasnt sure which wire was which coming off of the pick-up.