The Stovebolt Site Forums The Shop Area General Truck Talk Exhausted -- need a whole new exhaust system

Since you have a Chevy engine in your GMC, I wonder if the Chevy exhaust would work. There are "bending cards" for the Chevy.

See this link: http://www.1954advance-design.com/Web%20images/50-55%20exhaust%20systems%20specs/