yah it's do able cut and reweld a section of pipe from the muffler in the back to the front mount a hanger and create a hang point and your done.. it's similiar to some other oem side pipes...
you could also remove the back end of the piping and weld in a single chamber muffler after the cat conv and mount a hanger and hang point.. or u can take the it straight from the headers if u don't care bout emissions tickets and fire shooting out the sides..
true the area around the exhaust will be hot so u if u have ground effects u'll need to put in a heat shield... or hope the plastic doesn't melt.. and ya you will scrape them over speed bumps...
on the viper it's mounted higher in a recess for ground clearence but even still the underside gets kinda toasty.. takes practice..
here's a link:
http://s76.photobucket.com/alb...n.flv ... yes it's a datsun Z