I like the "drop the entire sub-frame" idea.

Why not cut off the link as close as you can to the bushing, and then just basically get medieval on that bushing/bolt. Cut/drill/beat until you've got it out, be careful to avoid damaging the mounting tabs on the sub-frame.

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC