Here is a picture of the 66-67 (148,149) B body tailpipe hangers installed. Muffler hangers are different and are located at the rear of the mufflers and bolted to the floor pan brackets.Here is the link that shows the diagram and location http://www.accurateltd.com/Hanger-B-body-Main-Support-Double-Loop-Design-D-737_p_127.html