I am going to do the exhaust system on my 67 barracuda here soon. I am not sure on what for mufflers to use. I had flowmasters on a 68 dart that i once had & i didnt like the sound at certain RPMs. It was to crackly for me. I am going to be putting the mufflers at the factory locations for an A body with duel exhaust. Also not to mention im on a budget. I have a pair of new mufflers off an B body. They are the ones that came on 440 & hemi cars. I am going with 2 1/2 pipes. I have TTI headers.