I use to have full time 4wd and a front Detroit on my K5. If you unlock the front hubs and run in high locked in the transfercase it will drive just like a part time 4wd with an open front axle. As far as the turning radius goes on the street no effect, offroad 2-point turns. When I'm in the rocks, backing up disengages the Detroit. Then I go forward turning until it locks up again, then I back up. Is this slow and tedius? Yes. Do I care? No. When I'm in the rocks I'm in no hurry. Let me ask a question of anyone with an ARB. Do you think you will ever replace any of the parts in the ARB, solenoid, air cylinder, air lines, fittings, compressor? I've been on the trail with ARB's and I've seen all of these parts fail. Not to mention the driver's asking me if they are locked up while I'm spotting them. I don't expect to ever replace any part of my Detroit Locker. My goal on my truck is to drive to a trail, go wheelin', and then drive home. Not repair my truck on the trail because I have the spare parts with me. I want someone that has had an ARB for 2 or 3 years of wheelin' several times a month to say nothing has ever broken on their ARB. As far as the air line is concerned, flying rocks, branches, barbed wire, fence posts can all take out an air line. I guess if you stay on the graded dirt roads you'll be just fine.
CB