I've had this '70 K/5 for about 6 years now. About all I have done is replace the interior and drive it. I bought it with a 6" BDS lift and 35" MT Baja Claw tires and 3.08 gears.
It rode really rough and bouncy and had a lot of body roll in the turns and would hardly move out of it's own way...
I had bought a 2½" Tuff Country EZ ride kit several years ago for another project that never got off the ground.
So I decided to install it along with 33" x 12.5 BFG AT tires, 3.73 gears, and a sway bar from a square body truck and changed to Rally wheels for a more classic look
The resulting difference is night and day! It drives like a different truck.
Before and after pictures.