If you want obnoxious get a straight trough one like glasspack/magnaflow. If you want one that sounds great at cruising and has a great performance sound when you step on it get a chambered one. Like a flowmaster or a turbo muffler. If you click on the YouTube link under my signature I have a couple of clips of the exhaust I've done on a 200CI.
thanks i was hearing a few of the flowmasters and i think imma go wit that one... and exhaust system??? would i have to make my own or are there any other cars that are interchangeable for a 75 ford mav??
if you're wanting a flowmaster, then you're prolly gonna want the 40 series 2 chamber or the "original" flow. and go to a respected muffler shop and get a quote, most give them away for free. I got my whole exhaust and flowmaster installed originally for $240 on my old engine setup w/ a warranty. you can make your own for cheaper.
your gonna have to make it yourself or pay a muffler shop. Out here it only runs like $99. Or double if you want dual exhuast. Also I would go with the cherrybomb turbo II, its sounds identical to the 40 series. I ran both mufflers, so I know . The flowmasters are like $70 and the Turbo is $18 at autozone.