Worked on the exhaust system replacement. My truck's a 65 and the regular auto parts companies still actually make some (not all) parts. In the case of exhaust systems, Walker. Went with Walker SoundFX muffler- not loud, but you can hear the old 6-banger run. Nice sound you don't hear much anymore. Plus the tailpipe fit nicely. About $150 into it. Did the work myself.