Air bags will do nothing for unladen ride, only for loads. They may even make it worse since there has to be some air in the bag even when unloaded. Do you need all of the Chevy capacity? How about taking a spring leaf out? Take it to a spring/axle shop and ask them about it.
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2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
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