three suspension questions

ok, I'm working towards tearing back into my 70. got a long list of things that need attention to make it as good a driver as my 64.

1. strut rods: I have an old pair of American muscle adjustable strut rods, that have some damage. what are guys running now, and why? mostly a touring/handling car.

2. rear springs: my espo 340 repop springs from the late 90s are pretty sacked. thinking about super stocks, but cant find the spring rates on the various weight ratings. anyone got them, and the rates for the XHD springs?

3. steering coupler is shot. again. for the 4th time since ive owned the car. other than the $texas$ borgeson joint, any solutions? power steering/floor shift, but don't mind modifying/welding.