Thanks, BigRondo. I would not have known where to begin or end without your excellent post. Tried to do it without cutting, but it just wasn't possible. Kudos to those who have been able to do so. Lost my top/rear bolt tab off the new unit, was trying to get the screw started and somehow chewed up the plastic tab. Clueless how that happened. But I got in the bottom rear screw and the front screw. Don't see why that won't hold just fine. The section on setting the new part to the right index using the cold/hot control was super valuable. Don't know that I would have thought to do that.
Still, one of the most frustrating repairs I have ever done - access and angles. AllData books this at 5.4 hours labor and a $112 part through a dealer or repair shop. That's over $600 and I have $50 into it and about 5 hours time. I don't mind the cut even though it is visible if you try to find it. I have 185k miles on the best vehicle I have ever owned, so it's long past being a show car. Should I add the cost of the ratcheting box set of wrenches? Nah, I needed them anyway and it sure made the job easier.