My 1954/55 GMC 2-ton GMC has a variety of flexible/rubber hoses in the vacuum systems (hydrovac brakes, rear-end selector, speedometer gear selector, PCV, and wiper motors - no vacuum advance on the distributor).
I found a great local hydraulic hose company that fabricated new hoses for about @$20, using the old brass/metal ends and brazing-on new-style brass hose-connectors. If you get desperate for a hose, you might contact them. The added cost of shipping would not make these repaired hoses more expensive than a replacement hose with fittings, if you could find one.
http://www.omniservices.com/ (my location: Omni Services, 190 Old Loudon Road, Latham, NY 12110, Phone: 866-396-4656) - 1-2 day turn-around for my jobs.
This is my first time dealing with this type of plumbing. I have just about finished restoring/renovating all the plumbing. This included cleaning all tubes, joints/ends, junction blocks, adapters, and one-way vacuum-stop valves (or, whatever they are called).
At each inverted flare,
a rubber-ring was used between the flare-end of the tube and the tube nut (on GMCs - I do not know about Chevy big trucks). I am using o-rings.
I hope I have no vacuum leaks. The GMC Maintenance Manual describes a
Vacuum Leak Test. I hope I do not have to give up and simply/only drive in low-range.
Please let us know what you go through to resolve your problem. Thanks.
