Based on some input from a member that cracked his case at the bearing directly behind the ring gear side of the front differential, I'm also working on a separate tubular reinforcement that will run from a front bulkhead bolt to one of the bell housing bolts. It will be bolted to the driver's side diff housing at a non-threaded 8mm boss in the case... I made and successfully tested a self-tapping 8mm/1.25 bolt that will be included with the add-on reinforcement for ease of installation since this boss will have to be threaded.
This should shoulder a lot of the load at the side of the case generated by the ring and pinion's tendency to "push" each other apart.
The prototype should be ready to go and shipped out for testing in the next few days. This part will definitely be installable with the transmission in the car.