If the puller won't shift it, turn it upside down and wedge some hardwood between the blade holder and the frame. Unbolt the engine from the frame so that it is hanging by the blade holder. Suspend the frame upside down, put it between a couple of 44's maybe if you can't find a more suitable way. Put the centre bolt back in but leave it about 1 turn loose. Whack the head of the bolt with a big hammer! If that doesn't break the grip you may have to resort to a gas axe.
