1968 Formula S Barracuda Leaf Spring Identification

What I think I learned was that there were two leaf packs used, one for lite duty and the other heavy duty (formula "S"?) which had 6 leafs. Available kits were not always accurate.

Agreed, I searched and looked at the pics of rebuild kits and counted to make sure the amount of inner liners and plastic rubs were correct for what I needed. The kit I purchased ended up with 1 extra liner and short one or two snap in plastic rubs if I remember correctly. I just purchased the extra plastic snap in to get it done.