Yes John I know the ring gear is separate from the flywheel, I know that casting went up into the 80’s but was unaware of it going into the 00’s. If it was for one of those six cylinders mentioned, were they externally balanced engines? This flywheel is drilled out for what appears to be a 360, three larger holes on the engine side of the flywheel. I have know idea how to post a picture of it or I would.