I have the same setup. I tried hooking my stock tack to the msd box and it still didn't work. I heard you have to run a tach adapter. I ended up using a Autometer tach.


[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)