Short story long, I got a set of tires at Pep Boys, and got an unbelievable price. I think they accidentally sent me a 4 for the price of 3 rebate even though the tires were half-price.
The only negative was that they broke one of my Cragar lug nuts, and didn't tell me, just tightened the acorn part on a few threads deep. A little sketchy.

About that time, I decided to replace all 20 of the old lug nuts, since they are very thin to fit on the 7/16th stud with a .592" OD shank. The holes in the Cragar rims are undersized, and they have since made them bigger.

This brings me around at long last to the point of the story. If you have the old rims, you need to use the parts number CRR-09005-4
instead of CRR 27721-4. CRR 27721-4 fits the newer wheels with a .684" OD shank, according to the tech guy at Summit Racing. They come in packs of 4, so I had to order 5 packs to make it around the car.