1) Gears (3.73 are a good overall performer)
2) Offroad (non-emissions locations) or high-flow cat H-pipe (emissions areas). Stock H pipe is bigtime restrictive
3) Underdrive pulleys. Cheap, easy power.
That'll make a huge difference in overall straight line performance. A shifter and subframe connectors are also a good idea to plant the power and make the shifts.
------------------
1991 LX Hatch 5.0L