Ah that's true. I've an LJ70, it's an original UK motor, 1988, but the previous owner basically restored it inside and out, minus a few bits, and had a shop install the 1UZFE.
The shop never finished the install to a decent spec, and it ran really rich when I got it with a misfire at low revs, none of the gauges were working and the oil sump was leaking badly, so I got a bit of a deal on it. The 4wd was also stuck on, but I jumped a vacuum line and it disengaged and now works properly.
I chased up a ton of small wiring issues, grounded the igniters properly, and replaced the plugs and dizzy cap/rotors and leads, and installed a missing O2 sensor on on side which was preventing the motor from running in closed loop. My fuel economy jumped from 16-17mpg to 25+ on the motorway!
I still have a lot of little things to sort, but I've put well over 1500 miles on it now, including some boggy offroad stuff for work and some snowy tracks recently. I love it, never want to sell it! Someday might swap out the 4:88 ring & pinion for a 4:11 for better motorway cruising, and my dream would eventually be a 3UZFE 4.3l vvti lump with a supercharger running a megasquirt ecu. I'd like to lift the body from the chassis next summer and give everything a good clean and paint as it's in pretty good nick for an old farm truck! A few rusty spots, but nothing mega at all. We have a little girl now, so time and ££ is in short supply, but the hard part is done fortunately!