Custom Manufactured Bistein rear shocks.  Designed specifically for '66-70 rear springs or Flexforms.
 
Koni-medium damping curves.
 
Incredible quality. Fully rebuildable  -  you will never need to buy another set of shocks!
 
Konis are good shocks, but these are much better.
 
Direct Fit-no mods required.  
 
These are calibrated the same as the more expensive rear units, but do not have a nitrogen fill port, so they are less expensive.  Same great performance, lower cost!