hey guys could use some help with this one. I have a 1964 chevy truck with factory tach and guages. I recently installed a new motor with a msd distributor, msd 6a box, and i called msd to figure out how to hook my tach, and i have gotten like three different answers. I even bought the tach adapter #8920, still no luck. The tach worked before this now it barley moves. anybody know how to hook this up all my wiring is brand new. i haven't hacked anything up, and i don't want to. My tach is the later style doesn't require the SUN transmiter. please let me know thank you
