There are a lot of things you can do, like those that have been mentioned. Other options would include using SVT front caliper brackets and installing larger brakes on the front. You could do stainless steel brake lines and I suggest flusing your brake system when those are done.
If yours doesnt have it, you could always install the lip spoiler on the trunk. An SVT rear bumper and sideskirts will fit as well. Leather seats are also drop in if you can find a donor car. If you want to upgrade the cars suspension, search for Corey, he can get you a deal on Koni struts and has a decent selection of springs. A larger rear sway bar is also an option.
BAT sells, IIRC, a 22mm rear bar, or you could look for an Aussie bar in the classifieds. Either of these I would highly reccomend upgrading your rear subframe mounts. Being a Duratec car, you would also be open to replacing the Y-pipe, and, I think, headers are also available.
Duratecs are known for having a water pump problem. Watch this, and if your temp acts up, get it replaced. Unless someone has replaced your with a metal impeller unit, the stock Ford units lose pieces of their plastic impeller causing the car to overheat.
Other then those, there are a few threads in this forum about pre-98 cars.
