I love you, man!!On a ’72, the hose passes through a hole below the A/C fan opening, near the A/C box drain on the passenger side. Large grommet molded to the original vacuum line. The connection would be at the same manifold fitting as the brake booster.
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That is the original supply lineConfusing thing is on my car, the grommet under the A/C box appears it had a hose through it at one time. pic is from inside the car.
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So, two Charger guys indicate the vacuum supply line combined with the water valve cable, never seen that way from the factory.
BTW, the original water valve cable hole is about a ½” in size, no way it would allow a vacuum hose to pass through with the original cable in the same ½” hole with a grommet.
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What hole does it use?Well on my 74 is like that and a 73 of a friend of mine the same. Maybe a 73/74 diff with 71/72. Never have paid attention of that on my buddies 71/72s actually
The ’71-72 B-body firewall, inner fenders, and front frame rails are basically the same stampings as ’70-74 E-bodies. The picture posted is the same as the ’71 & 72 B-body. The labeling is accurate for A/C cars with one exception, shows three small screw holes around the grommet hole for the A/C vacuum supply, never seen that.
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What hole does that cable use?I saw another picture with the holes, sounds like the ’71 A/C two hose grommet is secured with screws. None of my ‘72s with single hose grommets had screws or holes. Yea, the ’71 A/C with a vacuum actuated water valve also had a vacuum reservoir under the battery box. The ’72 and later, with a cable operated water valve, did not.