The D35 will not last long with 35 inch tires so plan on the axle upgrade sooner rather than later. 35 inch tires are going to be about max size for your D30. What axle are you wanting to upgrade to? Axle could effect your choice of wheel. You will want 3.75 to 4.0 inches of back spacing. Stick with 8 inch wheels and 12:50 tires.