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Confused about ported vs. Manifold vacuum.

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04-30-2020, 01:42 PM	#1
Daron65 Registered User Join Date: Oct 2019 Location: Monaca, PA Western PA Posts: 93	Confused about ported vs. Manifold vacuum. Can someone please explain which port I should hook up my vacuum advance on my dizzy to? I am running a blueprint 355 that dynoed at 430hp. With hei. I have read good and bad about using both. I know that we have many experienced machanics on this site. Can someone please explain the correct port to me, please? __________________ 1971 Chevrolet C20, Blueprint 355. Holly Street Avenger 430HP. Turbo 350 1952 Chevrolet Deluxe. Stock. True survivor with 1 paint job 1953 Buick Special. GM 355. Just a good smooth engine.

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