Thanks for the info...F.ord says that the blockers are discontinued. I found out that the Southern Gear out of Atlanta can special order the fiber lined blockers for 175.00/set or charge 37.00/pc for them (add an extra 3 days). I do not want to put the all-brass blockers in my car due to the fact that my car has 120,000 miles on it and the syncros look excellent. All of then have .070" - .080" gap except third gear which has about .040" (which is still acceptable according to the service manual, but I am going to replace it anyway). The reverse is another story. The blocker looks good, but the slider is chewed up. The brass blocker is not doing it's job!....Anyway, I had another company tell me that I had an M5R1...still frustrating. I guess I will order the blocker from southern gear, even though it seems a little pricey.