Use a small punch and hammer on the top of the wedges a few times. This will jar the rust loose and free them up abit, then use a small chisel and try and spin them using the slot (don't marr them too much unless you have new ones). Then try using a big sledge up and down. I just finished putting in my 6'' lift and my arm was off in 10 mins. using this method. Lots of penetrating oil is mandatory.
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