[gingi85]

Will halides attached to bridghead positions react in any nuclephilic substituion or elimination reactions? It seems that all posibilites should be impossible, either because of steric hinderance, double-bonding at a bridgehead, or sp2 hybridization at the bridgehead.

[agrobert]

This is a well studied topic.  I suggest you do some research.  Often studies are done with various tosylates as well.