I know we all have had this problem at some time in our projects. I bought an S10 4.11 rear end for my 1950 Chevy 1/2 ton (not that it matters). As I was cleaning it up and removing the brake parts (to include the backing plate), I discovered when I try to remove the bolts holding the backplate to the axle flange, the bolt heads broke off (even after liberal doses of penetrating rust killing lubricants). Now, I have the bolt shaft stuck in all four holes. What is your thoughts on the best remedy to remove the bolt shafts? By the way, I do have about 1/2 inch of the shaft sticking out the other side.