thanks for input. I am just looking at all my options. I agree about not having to cut the rear end... however it doesn't look like it is ez to keep the 6 lug pattern and have the gears you want and have disc brakes. Rear disc brake kits seem to be expensive if you can find them... I know it is possible to get axles from the wrecking yards that have the backing plates and brackets, and see if I could make something work.
Trailblazers are 6 lug but I believe the bolt circle is 6 on 5. Our older chevies and jimmys are 6 on 5.5... same as the new chevy full size
