lcfman,
The Tach is a factory option "RPO-266" and is located between the light switch and choke knobs. The bottom of the hole should be close to the bottom of the knob bezzels. Puts the knobs at 4 and 8 o'clock. The Low Air light if equiped with air brakes goes above the light knob at about 10 o'ckock on the tach.
Mike B
