I went down that path with my 54 1/2 ton. Tried NAPA, Autozone, Parts Plus, Pep Boys, you name it. No one had different length studs. Mine were 7/16 diameter and I needed to replace them with 9/16 diameter for new wheels. No one wanted to machine out the hubs while they were on the car. One garage/machine shop offered to do the job for over a grand. I still have my original wheels and tires. Let me know how you fare, and I hope your luck is better than mine.
