Bolt removal from radius arm

[Lawrence Zink <zink@pdq.net>]

Does any one have an easy method for removing the bolts from the radius
arm on the rear suspension of a 64 Spitfire.  I have been soaking the
bolts in penatrating oil for over a week, and have done everything I can
think of short of burning the out with a propane torch.  I am seiously
contemplating dynomite.  But would relish the idea of not destroying my
baby  to replace the trashed dif.  Any and all uggestions are always
appreciated.

TIA
Larry Zink
1964 Spitfire4