Just looking at "first blush" the van GVW is 8600 and the trailer GVW is 7700. That's a total of 16300 which is 1700 pounds more than the max GCWR. While it may be "doable" you're going to be at or over the GCWR with an extremely small V8 powering an extremely heavy load.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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