Where do factory ralley tach (71 Charger) wire or wires go to if msd 6 ???

[crazy nicky d]

 I have a Mopar performance mech. advance billet dist in car 440, and msd 6-a and want to hook up factory tach the wiring has not been attached from tach.  I want to know how many wires are on the back of tach and where they go,also how is the tach grounded by the housing????I  dont know any help would be greatly appreciated thanks....

[BROCK]

This thread (linked below) together with enginebay wiring diagrams & info from MSD will lead you to the answer you need.
http://wichargerguy.proboards101.com/index.cgi?action=display&board=interiour&thread=1667&page=1#14515