No such thing as off a tooth on these engines. You can loosen the bolt and spin the distributor back or forward 1/6th of a turn, then pull the spark plug wires off and move them one tower clockwise or counter-clockwise on the distributor cap. But first, I would turn the engine over until you have the #1 piston at TDC. After you have that, put the #1 plug wire on the tower which the rotor is pointing at and put the rest of the wires on in the proper firing order.
