How to properly remove dampener bolt?

Is the engine still in the car? If so here's a cheap way. Get a 1/2" long breaker bar with the right size socket. Put it on the crank bolt and position the breaker bar so that it is almost up against the K frame on the passenger's side under the car. Remove the coil wire and bump the engine with the started and the starter will break the crank bolt loose very easily.