Hi: Regarding the movement of the tree gear, it has no curator, if you loosen the center screw, it should turn without the tree moving, the traction that before the wedge And the #1 piston is in PMS, the canvas of the trees should already be lazy if you had removed them (I think that I understood) with the aim that the band is tense between the trees, and regularly the screw that regularly Ford puts in the engine to locate the crankshaft is located near the pole of the cranks in the back of the motor. Half -career pistons run the risk of folding the valves, already put the band and tense and even the fixed trees HSy to tighten the screws of the gear gears, if I do not remember it I remember the trees carries the hexagonal shape to use a key and thus squeeze it, if not otherwise you can break it. If you have another doubt, let's know