For future reference, the easiest way to get the crank bolt out is to get a breaker bar, a 4" extension, and the socket for the bolt, put them all together, and place the socket on the crank bolt, so that the end of the breaker bar handle is resting on the ground, to the drivers side of center. Disconnect the coil, and go bump the starter with the key. Bingo, the bolt is broken loose for you. Works every single time, except on Honda engines that are reverse rotation.
Take care,
~Chris