umm You do know (unless they have been changed) that one side is right hand thread (normal) and the other side is left hand thread on the lugs right?
I watched(I yelled out about the lug nuts to him AND the manager but they just ignored me untill both lugs on the car on one side were ruined) a tire shop take all of my friends 69 charger lug nuts and pop them right off. I asked my friend what they were going to do about it and they wanted to charge HIM to fix their goof. DUH didn't happen.
anyway look for a L in the center of the lug nut stud to make sure. PB blaster is your friend to help free up brake drums. that and a big hammer to help loosen the crud.