1967 Plymouth Valiant A/C Project Build - Chilled Chariot

To install the underdash unit, begin by sliding it up under the dash, place the hose connection through the factory blower motor opening, and fasten it to the firewall with the two supplied 3/8-inch bolts.

After it's bolted into place, go inside the car and attach the unit to the cowl. This requires drilling an 1/8-inch hole in the interior wall of the cowl and hanging the unit with the supplied bracket. NOTE: It's easier to connect the control cables to the box before hanging it in place.

Classic Auto Air also supplies this cover plate for under the hood. Attach it with the four screws.

Under the dash, the wiring is simple.

Just plug in the connectors.

The ducting requires a supplied adaptor to size the hose to connect the unit.

The standard A/C outlets mount under the dash and do not look intrusive to the interior.

Classic Auto Air supplies a new smaller glovebox liner to clear the in-dash assembly. In our case, the factory-style liner could still be installed.

Under the hood, first mount the compressor bracket. The bracket attaches to the upper water-pump bolts and intake. With the use of the supplied spacers, the stock alternator location is retained. The compressor bracket to the intake bracket is bolted together by the belt tensioner. (right of image)

The Sanden compressor is mounted to the bracket by its mounting tabs, and one bolt and bracket bolts to the cylinder head. There are actually four mounting points, but the final mounting point on top of the compressor could not be used because we used an aftermarket intake. We called Classic Auto Air, and they assured us that everything would be fine with the three mounting points we used. If you are using a stock intake, the fourth bracket/mounting point can be used.

Classic Auto Air even supplies the needed accessory belt to run the compressor. Did we mention you would need a pulley on the crankshaft to run the compressor? Well, that's supplied in the kit, as well.

Before you install the condenser, you need to attach the mounting tabs. The tabs are attached by using the supplied screws.

Next, loosen the radiator (or remove) and slide the condenser into place. The condenser is attached to the core support using 1/4-inch bolts.

Next, run the heater hoses and A/C line from the compressor to the firewall. The return line from the heater core gets a control valve installed. The return line is typically the line coming from the water pump to the firewall.

You need to run the condenser lines through the core support. No drilling is required, as factory installed holes are used.

The supplied filter/dryer is attached to the hard condenser line, and then mounted to the inner fender. The filter/dryer is a Mopar part, which makes eventual replacement easy if needed.

Connect the other compressor/condenser hose into the system.

Now connect the last hose to the dryer/ firewall connection. remember, each connection requires a supplied O-ring...

...and each O-ring must be oiled with the supplied oil before making any connection.

To protect the system from over-pressurizing, a safety switch is installed in the system. The switch is wired in sequence from the compressor to the switch inside.

You will need to drill a hole in the firewall for the unit's drain hose. Be sure to check on the engine side of the firewall before drilling.