It all depends on personal preference which way is the best. If you plan on doing mostly rockcrawling a dual case would be best, but costs much more, Plus you have to modify your drive lines and cut a new hole in the floor. For all around wheeling lower transfer case gears would work great, and would be cheaper. Marlin Crawler offers 4.0:1 and 4.7:1 transfer case gears, and dual case adapters. If most of your clutch problems are on the road, you should think about installing 5.29 ring and pinion gears. That would bring you back to stock running ratio with your 35" tires. Which would help you get up those small inclines better.