Here's the latest on my broken head stud saga.
Pulled the 12 steel studs off the top, no issues, got the 2 non broken dilivars off and the 2 dilivar remnants I could get vice grips on. That leaves 8 to be drilled. Here is what I've done today"
Stuffed all the openings and wrapped the rod ends
Ground the ends of the broken studs off flat
Mounted my handy dandy custom make drill guide to the engine (let me know if you are interested in one of these, works pretty good so far)
Drilled a 5/32 hole into the broken stud. Started with a left hand bit, but got dull very quickly. Changed to a right hand carbide bit and drilled about 3/4" into the stud.
Screwed a #3 screw extractor into the hold, tapped it a few times with a hammer to make sure it was set. Put on a tap handle and tried to turn the stud out.
The extractor stripped out of the stud before it would pull it out. Tried heating with a torch, but I guess not long enough. Next step I guess is to step up to the #4 size extractor and try again. Drill guide gave me a great pilot hole to drill into.