Springs,codes and ratings

[wadmalawjoe]

I have searched on this site as well googled it to death.
My spring code is KB. I would like to do the leveling kit via replacing the front springs. Its a 2wd so I have coil springs not the leaf springs. What the heck is the K spring rating?
There is all this x,w,v etc etc.
Seems like there would be a chart with all the codes and ratings.
Does anyone have that or something along those lines.

[Demo250]

Front coil spring codes on 4x2 psd were usually L = 4,850 pounds.
Some had spring code K = 4,550 pounds.