I done all the above. What I mostly do is just clean the threads with a tap and use stainless bolts with antiseize on them. If the threads are too far gone. I will retap the next size up and use stainless with antiseize. If you don't have antiseize use multi purpose grease.
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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