An alternative is high pressure gas Koni's from Pantera Performance in CO. They have adjustable spring perches and are available with either steel or aluminum bodies. Dennis will supply them with stock spring rates, if that's what you want. Shocks definitely play a larger role in ride quality than springs do. I was running 550lb/725lb springs with my Koni's and the ride was very comfortable, in fact, I would have liked it a bit firmer.
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