I am not sure what is so complicated about this procedure. 28 replies and the pulley is not off yet?

Ditch the pipe wrench, the special lumber and the general headache.

Rotate the engine so #1 is TDC on the compression stroke, back it off about a 1/4 rotation, feed about 18" if 1/4" cotton rope into the spark plug hole and rotate the crank back up. Trust me, it will lock everything in place well enough to break that bolt free. If it doesn't, use more rope.

Just make sure it is on the compression stroke. I doubt it would cause damage, but having the valves open on the exhaust/intake stroke could prove to be bad. Also, tie something to the free end of the rope to keep it from falling into the cylinder.

Good Luck,
Michael