what a mess! I stripped the nut on the crankshaft pulley while trying to un seize the engine! I took the nut off and tried reversing the nut and when I cranked it down it kept turning without locking down! I was told that the nut is tapered and niw I can’t get it off it keeps spinning and there is not enough room behind it to put a cats paw behind! Any ideas on how I can get it off without destroying the pulley? I tried with a forward cutting blade 1 inch wide for steel but it wasn’t getting anywhere with that plus I had to ride above the crankshaft threads! All ideas welcome here o how to get the nut off without ruining the threads?