BD, Check out the below extract from the 1955-59 FAM. Upper left corner red box is the main diagram for the exhaust at the rear 1/2 of the pickup and Panel/Suburban vehicles. Blue circle is the detail for the Panel and Suburban (Models 3105/3106/3116) tail pipe. Diagram shows the pipe heading straight back and out under the rear bumper, just below and on the outer side of the left frame rail. It appears the pickup had a shorter tail pipe with a turn down (ending just behind the rear cross member), while the Panel/Suburban pipe was a straight shot back. You can see the bends of the pipe as it goes up and over the axle hump area, then bends outward/turns below the frame rail before running parallel to the rail and out. Hope this helps.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
