HERE FOR YOUR REVIEW IS AN ITALIAN MADE, BY ANTONIO MASIERO, THE HIGHLY RESPECTED GEAR MANUFACTURERS OF ITALY, THE 10 SPLINE M22 INPUT AND CLUSTER GEAR SET FOR 1966 - 1970 MUNCIE FOUR SPEED M22. MANY OF YOU ALSO USE THIS SET IN THE EARLIER 1966 - 1970 UNITS TO CONVERT YOUR M20 OR M21 TO THE M22 GEARSET, (NOTE: 1ST 2ND 3RD GEARS AND REVERSE DRIVE IDLER GEAR ARE ALSO REQUIRED TO CONVERT YOUR M20 OR M21 TO M22). 2.20 TO 1 RATIO THE VERY SAME AS O.E. GM, 26 DRIVE TEETH 9.00 INCHS TOTAL OVERALL LENGTH, 10 SPLINE CLUTCH SHAFT, CLUSTER COUNT IS 27 22 19 17 AND IS THE 1" SHAFT ITALIAN MADE M22. THESE IS ALSO LISTED SEPARATELY IN ANOTHER SALE IF YOU ONLY NEED AN INPUT OR A CLUSTER.