A question, did all Panteras (71-74) come from the factory with a dual diaphragm (vacuum advance/retard) distributor? And part of that setup is the Distributor Vacuum Control Valve (12A091), where was it mounted? The attached diagram shows it in the water tube above the thermostat, but I don't have a fitting for it in my water tube. I've been told if there is no boss in the water tube then the car never had a valve. And if it never had a valve, then it never had a dual diaphragm (vacuum advance/retard) distributor. But when I look in the Pantera Parts Manual, all they list is dual diaphragm distributors for Panteras. And they list a Distributor Vacuum Control Valve for 1971 through 74. My car is a 72 #3334 and I don't have the boss in the water neck, but I seem to remember a dual diaphragm distributor in the car when I got it, but that was 28 years ago.
So fellow Pantera owners, if you have (or had) a Distributor Vacuum Control Valve where is it mounted? I’m particularly interested in 1972 Pre-L cars. And what distributor came with your car? I think 1971 had a single points distributor and 72 had dual points, but was it dual diaphragm too? Thanks in advance for any information.
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