Whoa! The deck is pretty easy to take off. There's no need to try and take off the blades by jacking up the tractor. It takes longer to explain it than to do it.
First, loosen the belt tensioner on the front of the tractor. It's that t-handle thing. Second, release the pins and unfasten the arms that go up at an angle from the deck to the sides of the tractor frame. Third, release the draft plate from the front of the tractor frame. Then take the draft plate off the deck. Finally, pull the hairpins out of the lift links and take the lift links off the deck. Pull the belt off the pulley and slide the deck out from under the tractor.
Should be pictures in the Gallery section of the weekendfreedommachinesDOTcom website.