Toyota Repair: crank nut, air impact wrench, toyota 4x4

Question
i am trying to replace my oil pump on an 86 toyota 4x4 but i cannot remove the crank nut that holds the pulley on

Answer
These can be extremely tight, in some cases a chain wrench can be used around the pulley to keep it from turning, it may require a 3ft long breaker bar to brek the bolt loose, the other solution is to remove the radiator so that an air impact wrench can be used but even so it may not break loose unless the breaker bar method is used.