I have an 1989 4cyl. mustang with an 1989 SC motor in it and I was wondering if anyone knows how to modify the stock 4cyl. tach so that it reads the correct RPM from the V6 crank signals? I have heard of using a resistor placed on the back of the tach to change the signal but I am not sure how this is done.
Thanks for any help,
Ryan
Thanks for any help,
Ryan