Once you have done that, you won't be afraid of anything.

If you do it manually, the tricky part in loosening the crank pulley bolt is to prevent the pulley from turning when you turn the bolt with a big break bar. To do that, you need a chain rench to grab the pulley and use one foot to prevent it from turning when you use both hand to pull the break bar. The torque for that bolt is 250 ft-pound while most of torque renches only go up to 180 ft-pound. Tighten it back is easy.

Good luck.