Wanna swap the current 32x11.50-15's on factory aluminum wheels on my 91 Burb 4x4, to a 16" wheel. Anybody know what BS/offset is required to do this swap with a 16x8 wheel? Also, 265's are about 32 tall, but 285's sure would add a little more beef and stuff the wheel wells- anybody know if they would fit stock, no lift? No wheelin, on the road all the time.