I'm can't even spell "injuneer" so all I can offer is opinion. I'd be afraid of causing damage to the loader arms - based on my experience. I had a loader on the front of my 450 IHC back in Alberta and I did a huge amount of damage to one cylinder (had to get it rebuilt) and one arm (had to cut, reweld and strengthen) when my foot slipped on the clutch while digging in a rock pile. The forward force of the tractor and the immovability of the rock pile caused the whole loader assembly to bend to one side.
I would be worried that the same thing could happen if you were pushing your tooth assembly underground in front of you ... catch a good solid root structure and what's going to give first?
My stepdad was a heck of an inventor and tinkerer before his death ... he built an FEL for his 8N, as well as a snowblade and wing and an entire backhoe assembly (which he finished the week before he passed away ... never got to use it). Anyway ... his experience with clearing his farm from wilderness in northern Alberta (with horses and later, his 8N) led him to drag rather than push. He dragged chains and other stuff to clear roots out. And for the really tough roots, he built my stepbrother (who has an old 'bota) a ripper tooth that fits on the 3ph. When he needs to yank a root, he puts the tooth down, snags the root, and then uses the top cylinder to lift it out.
Good luck ! and have fun ...