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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies

Heater vacuum fittings

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Heater vacuum fittings Empty Heater vacuum fittings

Post by JF74chevelle on Tue Feb 27, 2018 2:35 pm

I took my a/c off the firewall because it didn't work and I want to know if I need the vacuum fitting that is behind the carb on the intake manifold? I was planning to run my PVC to that port if I don't need it for my heater.
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Heater vacuum fittings Empty Re: Heater vacuum fittings

Post by Joe73 on Tue Feb 27, 2018 2:39 pm

As long as the fitting is 3/8 in in diameter at the carb base plate or below you can use it for your PCV
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Post by bracketchev1221 on Tue Feb 27, 2018 3:03 pm

Yeah, into the base plate of the carb is fine. May be better to put the power booster to that port, if its tee'd off something else.
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