some inexpensive mods to do...
i put ngk iridiums in and they last awhile and reflecta golded my heat shield around the tmic and y pipe underneath (hint mods are endless).
bushings are a cheap mod, especially if install yourself. like you i replaced my lat links with adjustable that came with bushings already. trailing arm and rear diff and subframe bushings are huge. i just replaced my front lca bushings, 2nd time around.
if you can bump your idle up to 900-1k rpm do it. was advised oem 500 idle was just too low to cool and oil the engine. the oem plastic tanks on the radiator will eventually crack and i bought a fleabay cx r dual core radiator for like $150...replaced the cheap drain plug with a brass for $2 and reused my oem fans/shrouds. last suggest water wetter or mocool...and a grimmspeed 160 degree thermostat...keep engine cooler. like your rims.