I tried fitting my 87 cylinder to my 90 and I think it won't work. It was acting like headgasket wouldn't seal and probably because of this extra port hole for coolant. Could I get a second opinion? See the rub inside there? A light hone won't take off fingernail size gouges right on nikasil? I need the one on the right. I'll pay 50 or more depending on bore condition. Has to be usable at least.