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

**'68OrangeSunshine** · 07-12-2007, 05:46 AM

Sorry, I don't have a digital cam. My install was done in the late '70s when even the "Company" didn't have digital imaging.
Simple install. Find a position on either the carb or the intake [best] for a 3/8" brass fitting; run 1/8 copper line from "pickup" to rear of engine, then down to any hole in firewall, bending to position under dash where you want to put your gauge. Tighten it up to air tight and you're good to go.
Mine' s on a '68 C/10 Stepside -- L6 292, Offy intake, Edelbrock 1404 4-Bbl carb, Clifford headers. Gauge is Mooneyes. Indicates 18" Hg @ 700 rpm, no load. 3~5" Hg @ 2000 rpm 45 mph uphill. A jumpy needle means sticking valves. Great gauge.

07-12-2007, 05:46 AM	#4
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,307	Re: Vacuum Gauge Install Sorry, I don't have a digital cam. My install was done in the late '70s when even the "Company" didn't have digital imaging. Simple install. Find a position on either the carb or the intake [best] for a 3/8" brass fitting; run 1/8 copper line from "pickup" to rear of engine, then down to any hole in firewall, bending to position under dash where you want to put your gauge. Tighten it up to air tight and you're good to go. Mine' s on a '68 C/10 Stepside -- L6 292, Offy intake, Edelbrock 1404 4-Bbl carb, Clifford headers. Gauge is Mooneyes. Indicates 18" Hg @ 700 rpm, no load. 3~5" Hg @ 2000 rpm 45 mph uphill. A jumpy needle means sticking valves. Great gauge. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.



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