Cool. I have had them sitting around for a few months anyways. I did end up installing 4 and they work as well as advertised
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These are a 4" lift and rate is good for a lighter to mid weight truck. They should be 52" eye to eye so they'll go into mounts built for 52" main leaves or if you're building mounts, work around 50 1/2" - ish for a main eye to center pin measurement.