Stappy

Hey guys...I'm in the market for a fox body stang. What I need to know is being as I've never owned a fox body, mostly old school stuff, where's the weak points? What are the common flex points or twist points on these cars? I heard the torque boxes can go bad...anything else? Pictures would help a bunch if you got any comments. Last thing I want to buy is a twisted up POS.

Thanks!