anyone running sidepipes?

i am considering buying a set of sidepipes for my '71 Dart. has anyone here ever installed a set on their Dart or A-body? please i'm looking for information on how it was done or what to look for, where or what kind to buy. the set i'm looking at are listed in Jeg's and are available in different lengths. the 70" long set looks to be the best fit. dont bother asking me why i want to do it or waste my time bashing me for thinking about it or doing it. if you can be of legitimate help, post what you know.