Scoliosis surgery: Harrington rod placement/fusion. Need support.

I had surgery for scoliosis in 1973, which included Harrington rod placement and spinal fusion of most of my spine. I still have curvature and muscle imbalance, along with a "twisted" rib age.

Consequently, I have severe digestive issues and muscle hardness on the lumbar region where the spine is curved. I am looking for some sort of therapy to soften, so to speak the "hard" region, and to improve my posture. I have somewhat of the "flat back" syndrome going on.

Looking for others who had this surgery in the 70's for support and conversation!