Not trying to start arguments or anything, but for some reason the people who i speak with who know Fbodies always tell me to stay away from Pacesetters...even the people at exhaust shops who install them on our cars all the time. They say they never line up right and they leak and all these bad things, which scared me away from them. Weird thing is, everybody i see on these forums say otherwise...I think i would go with their advice. Make sure you get ceramic coated though, it's much better to spend the extra money for them, it could save you major headaches later.
Oh and if you think pacesetter clearance is bad...DONT buy the SLP longtubes. Take a looksie at what i get to deal with (speedbumps = No way Hose'):


i know my cats and y hang lower than they are supposed to, cause i installed them by myself on my back, plus the metal was a bit bent since i got the system used. I'm gonna fix it haha