Just an FYI on repaired cranks....Save your self time & money, and just get a new one if you can't turn it and clean it all up without welding. Ask me how I know....Well...I have had a couple of them repaired now by welding them up, and then they straighten them. Problem is, they never stay strait due to built up stresses in the crank after welding, no matter how many times you straighten it. When it pulls in heat next, it will warp...Can some motors live with a welded crank that isn't straight, yes, but.....They are not good for the bearings or longevity.

As nice as they are when they come back all fixed, they don't stay that way...They get up to temp a couple of times, and they warp. Nothing you can do about it. They can use water when they repair it keep he heat localized, but they still warp...Been there, done that.