|
to drill and tap it he still has to, at least, pull the head off.
try to take the stud out again. be careful but forceful. maybe thats not the right choice of words but i hope you get it.
good luck and post some pics.
Edit: posted a few secs after you did.
the bolt went into plastic deformation.
i dont thing you can use an allen wrench on top any more. get a stud extractor tool and pull it out.
sent this pictures to ARP and have them send you a new one.
__________________
I build air pumps! 
|