Kent,
My TDr had a port list due to 45 years of weakening of the rear torsion bar due to a heavy prior owner. You might want to make sure that your have plenty of clearance between the wheel and the fender before deciding. Adjustment of the rear torsion setting on the TDr’s that i have looked at requires pulling the tub.
OR
you might be able to fix sag with coil over shocks which give you a bit of a boost that is somewhat adjustable. That’s what we put on Happy Jack’s. On mine, I added JCW aftermarket booster springs around the existing shocks. Both these fixes worked but Jack’s fix is more elegant. Gas shocks would also provide lift if needed but I didn’t want them.
Because we all are light in the front end, most of us just use old worn OEM oil front shocks.