steering vaugeness on my fox?

You definitely need a new alignment. Your tie rod ends may be shot. Since you are planning to lower the car anyway, I think I'd go ahead and get the bump steer kit, which is just fancy, beefier adjustable tie rod ends, and put them on with little or no shimming for correction and take it to the alignment shop. You kill two birds with one stone that way. Other than that, just check bushings, ball joints, rod ends, etc. Struts can cause abnormal tire wear too.

i second, the inner outer tie rods being the problem. or maybe even balljoints or wheels bearings.

There are three basic angles of alignment along with various other byproducts from each adjustment. Caster, Camber, and toe. Your tires wearing that badly on the insides would be extreme negative camber. Take a look at the front of your stang and use the rear as a reference point since it is a fixed point and then notice how far in the tops of your front tires tip in. Your "new" tires will look the same within no time so get that alignment soon.

Next, your steering wander. There are several things to look at. The biggest enemy of this problem is bumpsteer (which is very noticeable on lowered cars as you said). Knowing that your front end is sitting so low like that, you need to know why. Weather it be the isolators gone or all the way worn down, something not tightened in the suspension, or if it has in fact been lowered but just not with the use of caster/camber plates. Your wander itself if everything else is intact, should point to the inner tie rods or the rack itself. The outer tie rod ends don't go bad as fast as the inners because they are subjected to less movement. The other things to check out are the lower ball joints, the wheel bearings, and the control arm bushings. Bascially with the car lifted in the air, wiggle the hell out of the wheels in all directions and check on what moves - there are your problems!

Good luck on the gremlin!

i'd second the inner, outer tierods. and alos wheel bearings and ball joints, or maybe even control arms bushings

another alignment vote. also note that improper caster can allow a 'wallow' or the tendency to get stuck in ruts in the road. CC plates will allow one to correct this. but if something else it out of whack, you might not be close to factory settings (caster).

good luck.