Leaf Spring ID

Thanks for photo. Does not look like an OEM unit. Tried to attach pdf of spring section of 72 parts catalog. 340 springs are in HD section at bottom.

I´m not sure I follow you... but not any of "my" numbers in the pdf... right...
When weather gets a little warmer I will strip all the paint, and see if there are any other numbers.
Thanks so far.
Stefan