HDK coil over system - spring selection
You are right JR, The Motown Missile in 1972 used factory LCAs with coil overs.
What I ( and perhaps JD) meant was you cannot substitute the factory LCA in the HDK coil over conversion ( unless the frame is modified /notched for spring clearance ). There simply is not enough room for a 2.5" od coil spring using unmodified factory LCAs.
We wish you could, be a lot less $$$$
Good catch.