Need help, can't remove a bolt from my k-member

Ok so discussing this topic in a car chat earlier tonight and i've come up with a few unpleasant ideas(simply because its a pita)

1. Completely remove K-member, cut out a the top rectangular area to try and get a wrench on that bolt, remove the pump, then buy some replacement plate steel of appropriate thickness. Run the piece over to my buddy to have him weld the hell out of all 3 mounting nuts(for peace of mind) and weld that rectangular area back in place.

2. Basically same as above minus removing the K-member. Though i'm skeptical as to if i can even get a cutting wheel into that area with the pump.

3. Cut the pump at the remaining bolt area and the K-frame and do as above

4. Buy a replacement K-member and save the headache.(really don't wanna do this b/c the new ones arent cheap and a used one could potentially put me back to square one if/when i need a new box.