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I am looking to buy a rebuilt smog pump for my 1967 390 SanJose car. However, I am aware of two versions of this pump, one with two rubber hose fittings and another with three. I believe I need the pump with two fittings but I am not sure. The '67 Ford shop manual doesn't give me a good picture of the setup so I need some help. Can anyone shed some light on this for me?
 

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I'm working from memory here, but I think you need the two hose version. The original 1966 version had three; one from the air horn, and two out to the air logs. The later '66 version used one output hose, which was split at a valve. I believe the '67 version eliminated the second hose connection altogether.
 
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