Mufflers are somewhat a personal choice; I have 32" cherry bombs mounted aft of the cab under the bed of an 80 shortbed. At cruise speed they are quiet but give you the 6 cyl rap when accelerating. The header collectors are right underneath the floorboards and that is where I'm getting the resonance.Porters, Smitties and Cherry bombs are all glass packs that have a traditional sound; a balance tube between the pipes ahead of the mufflers will also help quiet things a bit.I personally don't care for the sound of Flowmasters on a six cylinder but that is again a matter of personal choice.....fats
