Otto - Chucks truck is a '46 so the FAM (1947-54) I think you are referring him to isn't going to help.
Chuck, Below is a pic I took from my 1929-46 Chevy Master Parts Price List with the only diagram of the complete exhaust system in that book. There are close up details showing the hanger pieces at the rear of the muffler attaching to the frame and the tail pipe parts mounted to the rear frame cross member. Hope this may help you get the info you need to show the muffler shop how things were originally.
