Hmm. I would think the ubj by 300k. Along with the fuel pump. Need to do a valve adjustment.
All 4 of your wheel bearings should be checked and replaced if needed.
Tierod ends maybe warn ( checked). Along with most if not all your rubber bushings components in your front and rear suspension.
Heater valve.
I think we have a few threads on here for higher mileage rigs and things that probably needs replaced we miss but I could be wrong..
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7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread:
https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer:
https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information:
https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html