3/4 Ton Rear Springs Differences?

[Jimbo0076]

Im looking for some rear springs for my 85 GMC K2500 because each set has a broke leaf so needing factory replacements without having to spend a ton for small lift springs or aftermarket ones. I was wondering if anyone would know the length of them and if the 2WD and 4WD ones would be the same possibly? Trying to find out for sure before I go out digging in the local JYs or browsing CL for replacements...that is all

BTW I know mine is a FIVE leaf pack. Four regular leafs with the fifth being the thicker overload