Figured I'd add to this thread and confirm. I recently swapped out the rear Belltech shock relocation brackets on my 08 Suburban LTZ / Autoride with the DJM shock relocation brackets. I also added the DJM lower trailing arm relocation brackets and WOW... I really noticed a big difference with not only the suspension control in while cornering but the stability under straight-line acceleration at WOT. It's tight. I highly recommend you have Tony send you the DJM rear hardware kit if you're running the 2-3/4 kit. On a side note, I didn't have to use the shorter DJM sway bar end links as I have hotchkis front and rear sways and the rear end links are already shorter and the sway bar is designed in such a manner that I couldn't get the end links to work anyhow so I just kept the hotchkis end links and it's working well as designed.
One last note regarding solving the GM lean on the Suburban with Autoride and Tony's 2-3/4 kit. During swapping to the DJM rear cornering kit, I tested out removing the right rear spacer while leaving the driver rear spacer installed... I'll say no more that if you have a Suburban you must so this NOW!!! Truck is level and handles amazingly!
I think that's enough typing for now