you may be able to trim the back of your low range selector slot with a recipro saw with the seat etc still in. you are just extending the slot by 20mm or so so just take the rubber boot off and cut and fold down. Easy.

Also, for Big Pig too, check the flexi joint at the steering box end of your steering column! this will need to be loosened and slipped down the shaft about 10mm to straighten out the rubber linkage again. If you dont do this then it will be in a constant state of stretch and will perish. have a look.

Pretty easy job though mate.

Good luck.