Vacuum Gauge question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Roberty · 05-02-2003, 02:00 PM

I noticed that Chevy Duty has a new repo Vacuum Gauge for our trucks listed in their catalog for $79.95. Will this work in a cluster without an original vacuum gage without any modifications or with only minimal mods do you think? Which port on the carb do these hook to and if anyone here has a truck with an originally equipped vacuum gauge equipped truck, was this just rubber line all the way from the gauge to the carb or was it metal line most the way?
Thanks,
Robert

Rod · 05-02-2003, 11:04 PM

Your inner metal plate needs to be correct to look factory. Otherwise you wont more than likely be able to cut it properly... I read here that someone had devised or knew of a press to make the correct bevelled hole.
See the pic for what I'm talkin about with the beveled hole missing.

Longhorn Man · 05-02-2003, 11:08 PM

As for where to plumb the hose, you'll want manifild vacume. A port directly off the manifold is preferable, but a lower port on your carb will work fine.

72 CustomCamper · 05-02-2003, 11:26 PM

Mine has one that my uncle installed years ago. He get the cluster out of a 72 C/50 and plumed it with tiny rubber vacuum hose. He tied it in at the vacuum T at the manafold behint the carb...

Chuck

Roberty · 05-02-2003, 11:28 PM

Quote:

Originally posted by Rod
Your inner metal plate needs to be correct to look factory. Otherwise you wont more than likely be able to cut it properly... I read here that someone had devised or knew of a press to make the correct beveled hole.
See the pic for what I'm talkin about with the beveled hole missing.

I am guessing that a cluster with an original air pressure gauge that mounts in the same spot as the vacuum gauge would work as well? Only problem would be the lack of the tach if it didn't include it as well, I guess. Anybody remember who it was that could stamp these plates with the correct beveled hole?

Rod · 05-02-2003, 11:54 PM

An air dash inner plate would work... tachs are common in those clustrers.

05-02-2003, 02:00 PM	#1
Roberty Hot Damn - Here I Am!! Join Date: Feb 2000 Location: Ringgold, Georgia Posts: 726	Vacuum Gauge question I noticed that Chevy Duty has a new repo Vacuum Gauge for our trucks listed in their catalog for $79.95. Will this work in a cluster without an original vacuum gage without any modifications or with only minimal mods do you think? Which port on the carb do these hook to and if anyone here has a truck with an originally equipped vacuum gauge equipped truck, was this just rubber line all the way from the gauge to the carb or was it metal line most the way? Thanks, Robert __________________ My vehicles: '90 Silverado Sport '71 Chevelle SS Convertible '70 C-10 - My Grandfather bought it new - original un-restored

05-02-2003, 11:04 PM	#2
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Your inner metal plate needs to be correct to look factory. Otherwise you wont more than likely be able to cut it properly... I read here that someone had devised or knew of a press to make the correct bevelled hole. See the pic for what I'm talkin about with the beveled hole missing. Attached Images __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

05-02-2003, 11:26 PM	#4
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,369	Mine has one that my uncle installed years ago. He get the cluster out of a 72 C/50 and plumed it with tiny rubber vacuum hose. He tied it in at the vacuum T at the manafold behint the carb... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

05-02-2003, 11:54 PM	#6
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	An air dash inner plate would work... tachs are common in those clustrers. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

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05-02-2003, 11:08 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	As for where to plumb the hose, you'll want manifild vacume. A port directly off the manifold is preferable, but a lower port on your carb will work fine.



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