When he said he stripped tha Allen bolts I assumed that he striped the heads of the Allen bolts not Sheared them off. So I assumed that they managed to remove the stripped Allen bolts and that only a source of the bolts is needed to complete the job.
I like to use heat to loosen things too but when you get something too hot it alters the structure of the metal. Heating steele cherry read that has any amount of carbon beyond what mild steel has will change the hardening and tempering of the metal. Heating gray cast iron cherry red can change it to white cast iron which is very hard and brittle.

__________________
84 300D, 82 Volvo 244Gl Diesel