If u said that u have a nice impact gun, then that should work, or else it's not that nice. U need a gun with more ft/lb of torque or remove the access shield between the tranny and motor to use the flywheel as leverage. They also make a tool where u don't have to rely on the flywheel or the gun or the TORCH??? It's a special socket where it fits into the hex shape of the crank pulley and u can use 2 breaker bar at the same time. Hint, use a breaker bar and extend it with a jack handle or a hollow pipe and u will get leverage. Please do not use a torch!!!