As a Mechanic, I have seen that the 90's Mustangs have their fair share of problems. Not many in the engine (other than the secondary air injection pump not registering 3 times on the same car, but to be fair, the kid was trying too hard) but mostly suspension and steering. When I towed, the majority of tows I did on Mustangs were for snapped ball joints on the driver side. I have done at least a half dozen control arms, inner and outer tie rods, and struts. It all seems to be on the drivers side that these all fail as well. If you go with it, I would make sure that the front suspension has been upgraded before going all out.