Year Models that 52" leaf Spings came on

[texinxin]

I'd like to check out a salvage yard to get some used springs for the back of my 1971 Jimmy(sveral of my leafs have cracked in half). I know they are 52" springs but does anyone know if these springs where used on other year models and if so what are they?

FYI, I spoke with ALCAN about rear custom springs. For a 4 "lift -52" springs with a soft ride its $480 plus shipping for the pair.

 

[bp71k5]

Supposedly if you get the later year stock springs (73+) they are softer than the earlier stuff. Just be aware that "soft" is a relative term when dealing with ~40 year old trucks...