You say it has a Ford Racing CAI, does the car have a tune? If not I would suggest getting a CAI that requires a tune, like a C&L Racer CAI and a SCT tuner combo from someone like American Muscle.
Gears are a great mod, do you have an auto or stick? if you're not planning on going F/I I would suggest 410 gears.
What kind of Magnaflows do you have, are they the chambered mufflers or the Magnapacks, the Magnapacks are canister style (round) if you have the Magnapacks I would suggest either a catted or O/R H or X pipe, I have the Mangapacks and an O/R X pipe and my car is LOUD.
But the best bang for your buck would be a Tune and a good CAI, I have a 93 Race tune and the C&L Racer CAI with the 410 gears (Mines an auto) and my car chirps 2nd 3rd 4th and has chirped 5th a few times.
A one piece aluminum drive shaft would be a great mod as well.
There are just so many things to do to these cars, the question is where to start
Best of luck