I have a set of leaf springs for sale from my 1972 k10 cummins swap project.
Fronts are from Offroad Design in Colorado built by Alcan. They were custom built to support the weight of a 12v cummins and provide 4" of lift, they are progressive and have 10 thin leafs in each pack. Supposedly best riding/articulating leafs available. These are brand new only used for mock up. Only reason I am selling is because I bought the same leafs but with more lift.
Paid $800 plus tax and shipping
http://offroaddesign.com/catalog/ORDCustomSprings.htm
Rear leafs are 52" tuff country ez ride 3" lift.
Paid $547 plus tax and shipping
I would prefer to sell all 4 together
$1000 plus shipping