Gary, you do have a bit of spare parts inventory and have been doing this for a few years (make that decades) more than I have. The largest socket I have is 1-1/8" and my largest drive is 1/2". But this new hobby gives me an excuse to buy more tools and that is always a good thing. You and so many others on the forum are living proof that necessity is the mother of invention.

 

The tool pictured is called a torque multiplier. You find them on eBay pretty often. Here's one now at a good price. They are expensive new. I think $50 should buy one.

Blue Point Geared Socket Wrench Removes HD Wheel Lug Nuts Budd for Trucks | eBay

The square headed inner nut is called a Dual Cap Nut, or DCN. I've seen them called thimbles too. Stu

 

Thanks Stu. I placed a bid for the heck of it. 8/28 update: I won the bid and will be the proud owner once it travels from CA to NY. I have to buy the two rods for it.