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Can't find ported vacuum on carb # 7027210

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73 Z28:
How many vacuum fittings does your carb have?   Some marine application carbs had only 1 or 2 and used no ported vacuum fittings.

completeunknown:
It has one coming out the passenger side that looks to be above the primary butterflies, a big one coming out the front, a small one that the vacuum break is connected to, and one on the front driver's side that looks like it is above the primary butterflies.  I believe the one on the front driver's side should be ported vacuum, but according to the vacuum gauge none of the fittings are ported vacuum.

Thanks

Cliff Ruggles:
Many early carburetors didn't provide a ported vacuum fitting for the distributor advance.  In and after 1968 most will have one, main casting, front, drivers side.....Cliff

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