I saw about removing the black wire on another post and did that yesterday as well. The plugs look ok. There are two things I need to adress in addition to the black wire. First the breather problem of oil blowing out of the pcv valve. I'll get a new pcv after I pull the motor and get all of the 30 years of oil and grease off of it to see if any gaskets are leaking. The next thing and kinda important is taking care of the sparks that were coming off of the heat shield at the front top of the motor and at the bottom front of the fly wheel while it was running. Good thing was even with the sparks there it was running good. LOL! It wasn't very safe though. Once I get it cleaned up and put back in I'll send an update.