I got an OC-3 from a friend and found more engine problems than I had expected (engine is seized)... no big deal, but in removing the head I snapped 2 of the head bolts,both in the outer portion of the block. I was considering heating up the block to see if the bolts would free up. If I heat the block with a propane torch, will I run a chance of cracking the block? All things considered, taking this little Oliver apart went pretty well. One bolt sticks above the block about 1/2 inch and the other is about 1/4 inch. I never have much luck drilling bolts our without ending up off center and ultimately into the block.      
  Any/ all suggestions taken seriously.
                            Thanks,
                                 Cal