Yes I have fitted this awesome Marlin Crawler kit into my 1992 Hilux, basically you buy this adapter plate from Marlin direct in America, it cost me R8 500. for freight as well as tax and the actual kit, to fit it you have to split your std transfer case, remove a few shafts and the add a few gears and then take another complete transfer case, split it and use one section of it that you then connect to the other end of the adapter plate, thus with the extra gears you now have a super low range.
This is awesome stuff, with this Marlin fitted to my vehicle, I can now select low range 4x4, turn up the ideal control knob so that the engine revs are at 2000 and then remove my foot from the excelerator pedal and the vehicle will move along very very slowly, this set up is excellent for rock crawling, the speedo does not even indicate any speed it is that slow, want to use the GPS and see what it reads the speed.
I then took a front double cardan jointed propshaft which is normally used at the front of the hilux and fitted it to the rear of my vehicle, I chucked out the two piece propshaft with the centre bearing, to be able to fit the front propshaft to the rear you also have to change the rear output flange of the transfer case, you have to fit a front transfer case output flange, some modifications to the front and rear propshafts are required, in their length.
But as an option, I also fitted the twin stick gear levers, thus my vehicle now has four gear levers, the normal long stick for 1 to 5 gear selection, then another gear lever, if it is back the vehicle is in High range and as soon as you push it foreward the vehicle is in low range, you can select low range in 2wd as well, then the other two levers give you a variety of gear selections, I can have low range front and rear, high range front and rear, low range at the front only, low range at the rear only and high range at the rear only, but no high range by itself at the front, it does get confusing.......