I plowed with a B2. It kept unscrewing the lug-nuts on the left wheel. I discovered this phenomenon when my left tire separated, hit a tree, bounced over the truck an inch from the cab and soared off into a creek.
A 1500 Chevy IFS is stronger than a Ranger IFS.
It's not like 2 men on the hood. There are 2 different forces in action here. The tongue load and then the weight you have to actually push. The torsion bars can easily handle 2 men on the hood. The axle shafts and joint have to handle the push to get the 5,000# trailer up the hill. When you push something up the hill you are constantly turning the wheels to steer it. The steering is a lot more sensitive than when pulling it. There will be lots of times when the joints have a lot of angle and a lot of torque on them at the same time. When you use the rear hitch, the front wheels are much less sensitive and you will do less turning, plus the much stronger rear axle will do most of the pulling.
Ford did not design the Ranger to do what you are suggesting and it won't survive it for long.