I have been restoring my own 1971 340 Duster and while going through a few K-members looking for a correct date code I discovered something I hadn't noticed before. My 3 K-members are all dated within a month of one another, 2 are from original 340 cars while one is from a 318 car (all 3 are Dusters/Demons). I have often wondered why 340 K-members all have a washer welded to the front drivers side of the member, seemingly no purpose for it. However upon closer inspection after getting them cleaned and blasted I discovered a C- shaped washer welded around the rear LCA mounting holes of the 340 K-members but NOT on the 318 K-members, they are otherwise 100% identical. The washer must have been added as quick method to ID one in production.
This pic is of one of the 340's and the 318 member.
