After you remove the instrument cluster, remove the screws for the
clock. The clock sits on a few pin connectors. Pry the clock free from
the cluster. Install the Tach using the screws removed for the clock.
The is a three spade connector on the back of the tach. Fish the cable
from the new clock through the hole and to the area behind the tach.
Locate the three rubber sliding wedges with a "T" shaped end view and
slide them into the matching openings on the periphery of the auxilliary
guage opening that you revealed when you first removed the dummy cover.
Slide the new clock into position in the hole. Install the clock cable
connector on the tach. Locate the red-white wire that was previously
unused in the cable cluster that comes to the combined instrument and
connect it to the single terminal on the tach.

Reconnect the rest of the wires to the combined instrument. Install the
four screws securing the instrument cluster. Fit the new guage cover
over the new clock and one of the old covers over the other opening.
Make sure the metal bracket for the dimmer and rear fog light switch is
under the mounting screws for for the cluster. Refit the left hand cover
and switches.

Bob