As Stipit says--use the gross (GVWR) for weight and 20% of that for the pin weight.
A dry wt of 8600 probably will gross at 10000 to 10500. 20% of 10500 is 2100lbs--automatically overloading the payload of your truck and probably the rear axle rating.
Can you do it--yeah; should you do it--that's up to you.
Joe
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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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