can't get crank /pulley bolt to break loose

Use the breaker bar with a tight fitting socket wedge the bar against something secure best bet is the ground disconnect power to ignition coil then bump/tap your ignition key .DO NOT ASK ANYONE TO HOLD THE BAR WHILE YOU DO THIS.THEY WILL GET HURT.

an impact wrench wont work, use a pipe about 5 ft long on your braker bar and step on it counterclclock, to hold the crank shaft remove the starter and palce a big socket on flywheen teeth against the housing. if bolt brakes it would not have made any difference how you removed it