Almost lost a wheel
Thank you all for the comments. Adapters are not, and never have been, my first choice. But it can be difficult to justify the cost of a BBP upgrade to a car that has limited value and desirability in the marketplace. A car that I've been trying to sell since the day after I purchased it.
At a minimum I would suggest to other early "A" owners who still have L.H. lugs on their cars to switch them out to R.H. lugs so you can use the larger conical seat lug nuts provided with the adapters if you do decide to use adapters. As well as proper torqueing and even a bit of locktite on threads. Car is back together with above minimum changes detailed above. Drove 100 mi. yesterday to car show and back without incident. I've been averaging 18K miles per year on this car so I'll make an effort to update thread as I get more miles accumulated on repair.