This is just an LSD albeit a good on. I didn't know his ls had locker alreadyThis is just an LSD albeit a good one except that 99 which had same locker as Gen 2. I didn't know his LS had locker already. 4.6 be of help for sure but still going into swap I'd go for best available option. That's just my opinion. Otherwise there is no sense to upgrade later to 4.9. Just money wasted.

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!)