I'm in the process of trying to repower an MTD snowblower. I have the engine off and now have to remove the bolt at the end of the pulley shaft and the pulleys. Is the bolt in the end of the shaft reverse thread? Also, any suggestions on how to hold the shaft while removing the bolt. I was gonna go with vice grips. I was looking foward to repowering with an Greyhound from Harbor Freight but the crank is the wrong diameter. Anyway, any help or advice is appreciated.