I have a 1992 S10 Blazer that im trying to remove the drivers side frame mount on

here is a picture:
http://www.flickr.com/photos/41584465@N05/3834037369/

Does anyone have any idea how to remove this without removing the differential (lowering it maybe just dont wanna take the whole thing off).

Also I have basic hand tools (no airtools/plasma cutters)

Any input is appreciated!!