Please help me spend money!!!

[JRowlette]

In a couple of weeks I am going to have about $400 to spend on my stang. The problem is, I don't know what to spend it on!! Here's what I have done to my car so far:

- Ordering X-pipe and MAC Flowpath tomorrow
- Steeda Subframes w/cross braces
- race crank pulley
- 3.55 gears
- E303 cam(came with the car)

I am considering getting a TFS Street heat or Cobra intake, but I have read posts that on a stock-headed car, you MIGHT get 10hp. Is this true?? I am also planning on adding nitrous in the future, or should I do it now?? I don't want to waste $400 of hard-earned money on something that is not going to make much of a diffrence.
I have read numerous posts dealing with this subject, but I still can't make up my mind!! If I could afford a set of heads or a blower, my problem would be solved, but I am a poor college student with a mediocre summer job. Please give advice!!