Here is a couple of thing I just did to the 98. Runs awesome
Airaid Cold Air Intake
Flowmaster 50 Series Muffler
Crane Throttle Body Spacer
Taylor Spark Plug Wires
Bosch Plugs Platinum+4
Accel Distributor Cap
Screamin’ Demon Coil
JET-180 Degree Thermostat, Powertech,
Bilstein Shocks
Manik Brush Guard & Light Guard: put this on 2002
Smittybuilt Side Bars
PIAA - 60XT Series Off Road Lights
Infinity 6002i Speakers

Next, maybe headers