Some more things to give you better gas milage:
Cap/Rotor
Plugs/Wires
Clean air filter
Check timing
Check and/or replace oxygen sensors
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Blueneonman - '95 5.0L Mustang GT Convertible | K&N Drop-in | FMS 9mm Wires | Hollow Cats | Flowmaster 2 Chambers | Subframes | 6-pt Rollcage | 14deg Timing | King Cobra Clutch | FMS Adjustable Clutch Cable | Coolest Neon Lighting on a Mustang EVER!
Homepage:
http://www16.brinkster.com/blueneonman/
Best time: 14.719 @94.87mph