Off Roading Leaf Springs

[AVerHage]

I have after market 8 and 10" springs on my 93 and I'm thinking of going up to a 14-16" and running 325/85R20 Military tires, the question is, and mind you I'm in Iraq so I can't do my own measuring, will my springs go on to a 92 half ton or not, Width Length and Front axle fitment, any advice or specs will help also any input on hydraulic steering for the cummins.