Skipper,
Are you hanging a stock single exhaust on your 1950 AD 1/2 ton? If so, the manifold down pipe will determine your drop of the exhaust. From the manifold down pipe the exhaust will begin to tapper up to the muffler mount on the frame. Suggest you use a light coat of grease in the pipe ends so you can adjust it easily so it will fit tight and properly.
Tim