It's possible if you push the rear end back 6". A Mag18 has more than enough power to turn the deck. On my Super, I have run marks on the back of the deck from the rear tires and at full lock, the fronts are awful close.
I'm not sure you'd be able to turn the front tires without that stretch. The super is also a few inches higher off the ground. Do you'd possibly have no lift.
And the shear weight of the deck is HARD on the tractor.
My opinion is no.