Impact gun might get them off.
If not remove the entire wheel, hub, and drum assembly. Weld a bar or something on the heads of the offending studs to prevent turning, then remove nut.

If you have a nut splitter or are real good and careful with the torch that's an option. In the end you'll still be removing the hub to replace the studs.

Last edited by Grigg; 02/14/2016 4:46 PM.
•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-