Leaf Spring P/N Identification Please.

Pulled out a set of leaf springs I've had for some yrs now. Are stamped 3400044. Can someone please identify them for me. Hate to toss into the recycle pile. Thanx

71 E-Body
There is a date code stamped on the same leaf as the part number.

Thanx Snoopy.
Didn't see any other #'s, but will check more closely. Anything special about these? Worth keeping, maybe using? John

I found them listed on two 1971 Challenger broadcast sheets, (1) 340-4 and (1) 383-4.

Since the stamped on part (SOP) numbers are different than the over the counter part number, this is my best guess.

Thanx for the feedback on these. I hadn't considered viewing info on build sheets. Regards

Being 6 leaf assemblies, figured on redoing them & using. Need those rebiuld kits: pads,straps,liners,etc.
Who's has done this recently & from which vendor? A Moparts sponsor would be 1st choice. Thanx