Originally Posted by MedSailor
Am impact driver used in the first place sure would have helped avoid this situation.
Any thoughts on how to apply said impact driver to the gnadgered studs? Only one of them has anything left of a slot on the head.
The ones that you have drilled pilot holes into may be a problem. However, you MAY be able to key them directly into the chuck of the above pictured drill/driver.
If you cannot use the drill, then vice grips and a hammer are your friends. Heat and oil as above, then crank the vicegrips down tight, and have a friend give the stud a stout whack, as you try to back the stud out with the vicegrips.