I don't know about 1 hour, but I have seen local shops install this and other similar spring/shock only lifts in under 2 hours...at their shop rate, that would be around 150 to 180 w/o tax or what they call misc add on.
I put mine on and it took four hours - but I am 62 and a bit slow and work by myself (that way all the beer stays in my cooler!).
08 JK 23S - Colorado Jeep Club No. 204
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