Sorry, need to throw in one more thing.
As mentioned earlier, its one thing to be able to pull something and another to stop it.
When I was looking for a tow vehicle last year that had a decent balance of HP, torque and towing capacity I noticed what a huge difference in the specs if the trailer had brakes or not.
I ended up with an 01 Mitsubishi Montero Sport XS.
Towing capacity with Brakes 5,000 lbs
Towing capacity w/o brakes something like 1500 lbs.
Obviously, this has nothing to do with the motor size.
Personally, I think wheelbase plays a part on how well something pulls.
Check with the manufactures specs.
Most idiotic pulling combo I managed was pulling my 69 442 on a car trailer with a 74 Olds Cutlass with a bumper hitch for over 200 miles. Scary.
When I was loading the car, the back end of the Cutlass came off the ground and started rolling. I ended up putting it up against a tree to stop that.