On a front blade, the turning forces have a lot to do with the angle of the blade. The more the blade is angled, the more force is applied to one side of the center line. And, the more it tries to turn the machine.
On a side blade, all the forces are applied to one side of the center line. The only resistance to turning forces will be the weight of the machine, and the friction of the tires to the ground. Since there is less friction on snow covered ground, it won't take much to create a lot of turning force on a lighter machine.
Adding length on to the front blade will provide a better result. Make some wings, and do some testing.
I can push a 72" plow on my little GC2310. You don't know what your equipment can do on your ground, until you try it.