Have t-5 setup for 1953 flathead pickup engine. Clutch wont disengage. Did some measurements and t-5 trans shaft is only 1/4 inch from raised center on clutch disk. Theirs plenty of depth for pilot bearing shaft. Im thinking clutch is hitting trans shaft and wont disengage. Pressure plate is 10 1/2 1800 lb and 10 1/2 clutch disc. All from speedway. no help from speedway. Is their another clutch disk that would give more clearance?