Removing mirror

["Danny Rendleman" <dannyr@flint.umich.edu>]

My 74 Midget's right hand mirror is broken off and the screw head holding 
the arm to the base is stripped.  Can this be drilled out so I can replace the 
mirror?  
Also need to rewire right front turn signal.  Do I remove unit by way 
of the two backing bolts.  There's not enough wire left on the unit 
to just connect the wire.
Would appreciate advice from anyone who has experience with these 
sorts of things.

Thanks.

Danny
dannyr@umich.edu