This is on my 68 Dart. The front and rear are big bolt pattern now. They used the 7/16 studs from the 4 inch pattern. Then I’m assuming they drilled the bigger pattern and re used the 7/16 studs. I hope they didn’t weld them in. I may have to install 1/2 inch studs. I’ll access it this weekend as it in storage 80 miles from home. Years ago I had a Demon with Centeines. The nuts were the shank type with the washers. They fit the studs and rims perfectly.