The dashpot only came on trucks with an auto transà the A/C valve (with the black cylinder thing on it) should have 2 linesà one to manifold vacuum, and one to the idle up diaphragm.

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My Truck: 1987 XtraCab DLX 22R 4WD 5 Speed Manual
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"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." -Jeremy Clarkson