I've been calling around the local junkyards and finally found an 02GT rear (ratio unknown, although http://www.americanmuscle.com/mustan...ial-gears.html says that means 3.27) that comes with brakes for $450 (another dealer offered a Mach1 04 with better 3.55 but "it may not have brakes" for $850 so I passed on that one!).

What do I look for when I go? I've never bought such a thing second hand and have no idea what to look for. What is acceptable slop when turning axles and pulling in/out?

Just curious, do all GT have limited slip? Seems like a nice plus.

BTW, I know it's a wide rear - no worries I have no wheels yet and running fenderless (and very wide wheels).