Well, if it has 2 axles rated for 8,000 each, there wouldn't be a problem. Even if it is rated to 19,000 lbs., and 20% on the hitch will still put the axle carried weight under 16,000 lbs, so 8,000 lb. rated axles would meet the need. Just not a lot of room for excess. Personally I would examine the running gear and suspension very closely. If the springs are OEM I would expect them to be flat.
FWIW, our Momentum would be rated at 18,000 lbs. if it came specced with the 8,000 lb. rated axles. It only came with 7,000 lb. rated axles, so it the GVWR is 16,800 lbs.