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I've been through the manuals, but I can't find any information about how the vacuum tubing is routed behind the dash? Is it a rubber hose or steel line from where it comes through the firewall over to the windshield hollow bolt?

Thanks

John

Probably rubber. Mine is missing as my truck is under construction The inside of that hollow bolt has about a 1" smooth nipple that protrudes into the cab (easy to slide a tube and clamp over) If it were any kind of metal tube I would think it would be threaded or flared.

If I understand what your asking, it's the windshield wiper hose running from the metal line attached to the fuel pump. The line enters the firewall and crosses along the inside of the firewall (supported by clips attached to the firewall) and attaches to the windshield wiper hinge tube which goes through the left windshield pillar.

According to the ORD 9, pg 427 Part No. CC-1271729, it's a rubber hose OD 7/16, ID 7/32 (same as other wiper hoses) and 55 inches long.

Hope that helps.

Thanks for the help. I appreciate it.

John