I would do the suspension upgrades first (Shocks, EE Swaybar, Front End Links). This will greatly improve the handling of our Trac, and make it safer.
Then:
1. Exhaust
2. Intake*
3. TB*
4. C&L MAF Housing*
5. XCal 3 w/custom tunes from site sponsor Torrie
6. R/T Y-pipe and high-flow catalytic converter*
*--Can be purchased from site sponsor Zabteck.
I would echo what others have said about the benefits of a tuner over a chip. It's versatile, you can buy up to three different tunes for use with your vehicle, it's easy to use, you can use it to read CEL codes, and if you ever get rid of your Trac, you can use it with another Ford vehicle as long as you return the Trac to the stock tune and unlock the tuner. Oh, and Torrie will work with you to tweak your tunes for your specific vehicle.:banana: