Those that know me know I had just rebuilt my 235. I had run it about a thousand miles and the NOS rope rear seal disintegrated and caused the oil to thicken and my newly rebuilt motor is now an anchor. Question is, has anyone else had this happen? I got the NOS piece from Stovebolt who swears by them. My mechanic wants to try to use a 55 neoprene seal. Any advice on this would be appreciated.