I'm looking for some help in installing a set or single flowmaster exhaust system on my 1968 camaro convertible...it has a 383 stroker with headers, I prefer two mufflers but will go with the one horizontal dual outlet if I have to. The main concern is I would like the quieter 3baffle design if possible vs the louder 2baffle setup. Is there a pn you found that will fit on a convertible? thanks