Need advise quickly!

Dang man. Sorry to hear about the injury.

Well, there isn't a great deal left for as far as simple bolt ons go. But here's what I can think of:

Underdrive pulleys. Worth maybe 10 hp and a .1 in the 1/4; can be had for $125ish used.

TB/Plenum. 10-15 hp and better throttle response; $160-$250.

K&N Drop in Filter. 5 hp; $60.

Programmer. 10-15 hp and the means to dyno tune the car in the future; $350.

Speed cal. Corrects the speedo; $100.

That's about all I can think of for as far as simple bolt ons go.
 
This may sound like a dumb question but what is TA?

Timing adjuster. Allows you to change the timing. A programmer does the same thing, and if you are getting a programmer, then don't worry about this. It is more or less a cheaper alternative to a programmer, but with as many mods as you will have, my opinion is that you go ahead and get a programmer. Just my 2 cents.
 
Also, if you purchase from AM, be sure to PM the Stangnet sponsor (can't remember the name, is something like AMEmily or something like that, you can find it in the American Muscle sub-forum on here) and ask her for the forum discount code. IIRC, it's like 6 or 7%, which is quite a bit if you order some of that stuff from them.

Damn! I just ordered a new SCT tuner off there.... this would have been nice to know before hand....

As for the speedo being off... I have 3.73 gears in my car, and the speedo is about 20km/h off all the time (really freaking annoying)