FI is a must!! Its not that the 1UZ isnt enough, it goes fine, but there is never enough under the right foot.
Got some 3.9 diff gears fitted along with a Lokka, its out of a 4wd, unlocks when going round corners with no load but stomp the throttle and it locks everything up like a spool, its good fun!!. Had the CV joint fail in the tailshaft the other week due to very poor work by the tailshaft mob which caused the rear gearbox seal to leak due to massive vibrations (new seal hasn't fixed it either, its better but still leaks slightly) but other than that little set back all is running sweet.
Looking for another 1UZ to start work on fabricating some exhaust manifolds for a turbo (leaning towards an internally gated GT35/40R at this stage, similar to the BA XR6 turbo)