There should be a diagram pasted under the hood.
get a chiltons repair manual from the library for 67 chevy's.
I have the original owners manual for a Ford 1968 Thunderbird. I scanned an image of the diagram and posted it here: http://www.opensourceopportunities.com/Ford-Thunderbird-1968-fuse-diagram.jpg
You can find a free Ford F1 50 vacuum diagram at most Ford dealerships. Many auto-parts stores will have the vacuum diagram.
Which vacuum diagram The Underhood for the engine or the vacuum for the interior /AC system?
You can find a vacuum diagram for your 1992 Chevy Lumina at most Chevrolet dealerships. Chevrolet service manuals will have the vacuum diagram and can be found at most local libraries.
Under hood diagram or autozone.com
You can find the 1986 Chevrolet vacuum line diagram at most Chevrolet dealerships. The vacuum line diagram can also be found at most auto-parts stores.
go to thunderbird ranch
Where can you find a vacuum line diagram for a 1974 ford maverick engine compartment
A person can find a vacuum diagram for this car in the maintenance manual. They can also ask for a print out of the diagram at an auto part store.
vacuum diagram for 1978 cordoba