I made a rear loader for my old Ford 2000, from a TSC pond scoop and lift boom. It was more effective than a factory front loader on that 2wd tractor (other than a stiff neck) because it didn't have the traction issue.
A front loader on a 2wd tractor causes the tractor to loose traction when it is loaded, but the loaded rear loader increases traction. That makes it a lot easier to break material out of a hard pile on soft ground.
I hooked the lift boom to the top link position on the scoop, and made (2) lower link extensions from 4" x 1/4" angle iron (approximately 5 ft long). I also used a pair of TSC lower link stabilizers with it to keep from bending the Ford's lower links when I stabbed the scoop into a pile.
That rear loader worked great for loading a manure spreader, but I also used it to load a dump truck with dirt and stone. The best part was the cost (free), since I already had all the components to make it.
You need a decent amount of 3 point lift capacity to use it. My Ford 8n, could just barely lift the empty scoop, but the 2000 would lift it heaping full.
I only got rid of it after getting a 4wd tractor with a front loader (no traction issue there), and no stiff neck.