We have a 10 year old Nissan Armada with an 8,500 towing capacity, and I routinely pull our 28QXFBWA with a Verado 425.
If tank is full, weight of boat + trailer is 8,100 lbs (the Sea Legs are 800 lbs of that) but the Armada handles it just fine.
Only three thins I'd add are (1) I don't...