HEY. wow i'm going through the same thing. exact same thing. w/ a 95 gt. 100k miles.
it's your bushings bro. time for some new ones. order energy suspension hyperflex for 239$. front end bushings aren't a hard job.
take a look at your caster camber plates. is that bushing in there tweaked as hell and do your tires have a little too much negative camber? that's cuz they're worn out.
if you have stock bushings on your 94 and 95 mustangs, like me, it's time for new ones. no point in getting an alignment when your bushings are so shot that they're giving you that "playful" feeling in the steering wheel.