340Ks are a special case. They have re-inforcing at the LCA pivots, and a washer welded up front just to ID it. IDK if this was an across the board modification, as I have only seen it on 70/71s
All Heavy Duty Suspensions have the reinforced K frames and other mods. They can be found on BB A's, Formula S and other "handling" cars. I would also assume Dart GT and GTS.
