super stock springs 002/003

Can someone tell me where I can find the 002 or 003 number on the springs?

The previous owner of the car I bought last fall told me he put "super stock" springs on it. When I asked him what was different about the SS springs, he told me he didn't know and when looking for a used set to replace the sagging originals he came across them at a good price.

So now that I know what they're for, it seems a little silly to have these on a Slant 6 car. The car sits fairly level, so maybe they're both the 003's? I'll take a picture of the back of the car when I get home. I'd kind of like to know what's really in there. Maybe they're not even SS after all.