I'd certainly skip on swapping 4.636. Biggest cost would be in labor. You can find matching 4.9 in all 3.5L MSports and Gen 3 XLS 01-02


92 SR, 285/75R16 Yoko MT ARB locker GAST compressor AirLift 1000 MM10500 Snorkel custom rear bumper
02 Montero LS died protecting the master
08 PowerWagon (stock!)