Yes, lots of videos oyr there for changing transmissions. I already changed an engine and transmission in one. It's not horrible it just takes time.
I am sure you can do it.
Just make sure when changing the TC and transmission. That TC is fully in before putting the bell housing bolts in. Verify that the flex plate can move independently from the TC.
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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