Can You make a Sure Grip?

You can buy the 3.23 open. Then all you need to install the sure grip into the 3.23 case is a dial indicator so you can set the backlash. The hard part, setting the pinion depth, has already been done. Is the sure grip used with bearings? Or talk to Dr Diff and get a new Sure Grip with bearings and swap that into your 3.23's.