Intake Manifold Vacuum T-Fitting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mazlures · Yesterday, 01:55 PM

Good afternoon guys. Does anyone have a picture of the stock (or one that would work) intake manifold vacuum T-fitting that would go on my 1972 GMC Sierra Grande!? I has a 350 sbc on an automatic TH400, I believe it is a 3 way prong fitting but I’m not quite certain of what size the prongs need to be. I believe it goes like this:

Brake Booster - 3/8” hose size
Transmission Modulator - !? Size
AC - !? Size
Thread size to bolt onto intake manifold - 3/8”!?

I would really appreciate some guidance on what fitting would work and where I could get one please!!

Thank you very much in advance, have a blessed day.

Yesterday, 01:55 PM	#1
Mazlures Registered User Join Date: Mar 2022 Location: Santo, TX Posts: 11	Intake Manifold Vacuum T-Fitting Good afternoon guys. Does anyone have a picture of the stock (or one that would work) intake manifold vacuum T-fitting that would go on my 1972 GMC Sierra Grande!? I has a 350 sbc on an automatic TH400, I believe it is a 3 way prong fitting but I’m not quite certain of what size the prongs need to be. I believe it goes like this: Brake Booster - 3/8” hose size Transmission Modulator - !? Size AC - !? Size Thread size to bolt onto intake manifold - 3/8”!? I would really appreciate some guidance on what fitting would work and where I could get one please!! Thank you very much in advance, have a blessed day. __________________ God first, family, friends and old trucks! ~1972 GMC Sierra Grande Long Bed Fleetside~ ~1977 GMC Sierra Short Bed Stepside~ sold ~1970 Chevy C10 Long Bed Stepside~ sold ~1966 Ford F100 Long Bed Fleetside~ sold



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