I put an ARB for a 98-02 100 series Land Cruiser on mine a couple of weeks ago. I had to cut the two little double can crush things off the front of the frame and I added an "L" shaped 2" square tubing bracket in their place to recreate the front frame horns of a 100 series. The piece was about 4" tall and 4" long from the front frame cross member, mounted flat with the bottom of the frame. This let me run the front through bolts like the original mounting was intended. The bolt holes on the 100 are different where the bumper mounts to the front tow hooks. I thought they may be the same, as the frames are nearly the same width, but the spacing is both narrower side to side on the tow hook holes and the tow hooks themselves are bigger on a 100 series, so the holes are wider spaced. I opened up the rear holes towards the engine on both sides and drilled a new hole inbetween the existing holes.
Overall the fit was pretty good, I ran the bumper about as far forward and down as I could in the mounting holes adjustment range. The wings protrude into the wheel wells about and inch or more, but the front tires don't travel that way under compression, so I did not trim it at all. Also the bumper is just a tad wide overall, but with bushwacker flares on the wheel wells it sticks out to each side about 3/4" or so.
It looks good, but it did add some weight to the front, and seemed to offset the balance of the truck slightly, as in rear traction seemed a tiny bit decreased. I may add a little ballast to the rear tire carrier cross member to offset it.
