Wow, you're already a 'search' nazi and you have a whopping 11 more posts than this guy, you haven't been around long enough to be a dick, if you don't have an answer, don't be obnoxious, the guy asked a simple question - yeah it's probably been asked before but, like you haven't asked a question that hasn't been asked before? I'll answer for you.
http://forums.stangnet.com/showthread.php?t=579457 4.2 swap thread, you started - answered before.
http://forums.stangnet.com/showthread.php?t=567094 your own thread about exhaust, glasspacks in this case - answered before.
http://forums.stangnet.com/showthread.php?t=552291 stock horsepoewr question, you asked - answered before.
In short, don't be a dick, dick.