<VV> Stuck Bolt

[Ron]

On my troublesome '62 wagon, the left front wheel camber adjusting bolts 
aren't co-operating very much.  Both of the nuts loosened OK and the front 
bolt loosened and turns easily.  The rear bolt, however, appears to be 
rusted in.  It is difficult to access and so far I've broken two 3/8" U 
joints, one a Snap On, and a 6" 3/8" extension trying to get it loose with 
no luck at all.  You can't drill it out because you can't get a straight 
shot at it and a socket with a U joint seems to be the only way to reach it. 
Removing the upper control arm would be nice but step two in the manual is 
to remove these two bolts.  Has anyone else had this problem and if so, how 
was it solved?
RonH