My 351 dropped a valve this weekend which thoroughly trashed the engine. I had a 289 in my shop which I did a quick rebuild on in order to get going again, only to realize it has a smaller, five bolt bellhousing pattern which doesn't match up with my C6. I didn't know they ever made a 289 with the smaller pattern. Anyway, I need to know if there is any kind of adapter out there to mate up the two bolt patterns. I've searched the internet with no luck so far. Thanks alot!