OK, after spending several hours online and trying to get that torsion spring back in place, I finally gave up and took the mower to a Sears technician. He did succeed in getting it back in place but it wasn't easy. The steps he followed were:
1. leave the bracket on the mower deck bolted down.
2.put one end of the spring through the hole in the rear top of discharge door
3. push the rod hinge about half way through the holes in the discharge door, bracket, and spring.
4. now the hard part. turn the spring to get the other end to lie flat on the top of bracket with the end of the spring facing back- this requires use of needle nose pliers and a screwdriver and a lot of bending over, cussing, fine hand work - and then work the rod through the bracket and door holes on the other end. It took the tech about 30 minutes for this simple task, so I don't feel so bad. Hope this helps someone else.