Well 1UZ is a Good engine with around 250 hps and it does not matter if its a car engine or not .. what matters is the Gear and the Axle ratio .. May i ask what the point of swaping a 1uz in ur first 4x4 ? if you just want for the V8 dream then its ok .. other wise find a good 70 with a decent 1kZ engine in it .. and i tell it its more then enough for daily use or offroad aswell .. and it would give you less headache and you would enjoy ur 4x4 more...
Also u can built up 70 as per you liking aswell and soop the engine up, place bigger wheels and tyres, play with the ratio. Go through this thread https://www.pakwheels.com/forums/4x4-clubs-off-roaders-suv/201695-landcruiser-kzj-70-sheryar
you would see how my younger brother build his 4x4 bit by bit and trust me its a very serious off roader now ...