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I'm working on a 67 FB 289 C4 combo. I am installing COBRA valve covers and K code air cleaner but am unsure of the correct chrome oil cap for `67. It is a non emissions car.
Thanks for your help. Brock
 

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"non-emissions" means no closed positive crankcase emission system.
In English that means no hose from the valve cover breather to the air cleaner base plate.
 

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Greetings to BC!!

So far as I remember the 'over the counter' Cobra engine beautification kits have a push-on oil filler cap in chrome with a Ford stamping on top. These caps exist in two versions. One for open crank case ventilation: they have breathing holes at the underside. Second for closed crankcase ventilation: they have a nozzle for a hose to the air cleaner.
 
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