Yeah, I saw those two instructional links as well. I performed the "stuck pressure valve" procedure on the first pump, but then I had the same symptoms on the second pump as well.Are you sure you have the correct reverse direction pump?
The Lares part number is 2309, which lists applications only for '86-'87 TR and '89 TTA, so the part number is right. It would be a major coincidence if two pumps, bought 8 weeks apart, were both mis-boxed as CCW rotation.
To me, the symptoms of zero power assist and no obvious flow (as observed in the reservoir) point towards either pump rotation wrong, a stuck pressure valve, air pocket, or blockage... But like I said, I've checked all those items at some point during troubleshooting. That's why I'm extremely frustrated. This is a simple system that I can't get to work!
I guess I have to start over with the stuck pressure valve procedure (AGAIN), bleed the system (AGAIN), and see where I'm at. Time to make another gigantic mess (AGAIN).