Picked this up at Tomahawk. Can't remember if I paid $1 or $2 for it.
In any case there are four leads: blue, black, gray, and purple, and a pulse/rev dial with settings of H, 2,3, 4, and 6.
Can anyone point me to a data sheet for this, or tell me which wire goes where?
And will this tach work with an early 70s CI ignition? I vaguely recall that there was a special tach for those. I also think there is a gray wire from magic box, not otherwise used, that might be for the tach.
Thanks for any help.