Well after driving my new to me 40 home I decided to take care of a couple of the problems I noticed like the crank pulley wobble, thought for sure it would be something simple so I picked up a used pulley and got to work. Once I pulled it off I discovered a bit of a problem, looks like the key destroyed the crank. My question is what do I do about this aside from the standard "rebuild the engine" answer. There has to be some options here