I might have misunderstood your last post but..... I wouldnt try to pull the crank pulley, unless that would help you reach the crank bolt easier, I would just try to turn the crank over by turning the crank pulley bolt by hand with a ratchet. I would not put too much pressure on the bolt as you could possibly snap it off. However, if you can snap that bolt off by hand you are a better mine than I am. I know space is probably a concern but a wooden dowel down the spark plug port that you can tap with a hammer may break the rings free from the cylinder head. You would be tapping on the piston head directly that way. Could be very hard to access however. just a thought. good luck.