Flywheel puller is your best bet (buy 1 on ebay or may be here someone has an xtra, borrow possibly or use a local shop) threads on shaft are right hand (counter clock wise to loosen) flywheel side only, clutch side has left hand threads so clockwise to loosen clutch. Standard procedures I believe uses a piston stop or piece of rope, you can find those methods in the forum somewhere. It may be a no no but I take the clutch and flywheel nuts off with impact wrenches, but am careful to go the right direction and gentle on the trigger until they come loose. Crankshaft ends some times break if you are careless doing it this way.