Does anyone know if the Autometer 6831 tach is magneto specific or can it be used on a GM HEI ignition? I've looked on Autometers website but it isn't real clear if it's magneto specific. The reason i ask is i've been wanting to buy a tach for my rig and forgot that i had this one laying around (brand new in box) from my race car days. Yes it's a little overkill for my rig but i already own it.
