Complete modern computerized machine shop service to bore the 7/8" countershaft hole in your 64-65 Case number 3851325 to the large pin size of the 66 - 74 cases. This allows a "Second Life" for those early cases with badly worn 7/8" pin support holes that can no longer be used because of out of tolerance, improper support and leakage issues. All work is performed by experienced "Long Term" machinists on computer controlled equipment using original factory prints for correct dimensional data. We do them in our own facility, right here in Central Michigan for total quality control. Turn around time is typically 10 days, (most cases are done in 3 days) from the time we recieve them. Call us TOLL FREE at 1-877-614-GEAR to arrange the machine work that your case needs to put it right back in "Factory New" service condition.