Go to the "Links" page,check-out the exhaust section,and you should be able to find your answer. There's one shop,(don't remember the name), on there that uses p.v.c. tubing,as a mock-up tool.Pretty cool video! Hope this helps.

Just sold: 1955 2nd Series 6500 2-Ton Flatbed Truck
Mo' Tater
In the Stovebolt Gallery
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It takes an awful big dog to weigh a ton.