Massey Harris - Fits: [ Colt (21), Mustang (23), 101 Jr, 102 Jr, 20, 20K, 22, 22K, 23K, 30, 30K, 81, 82 (all using a 9-1/4" clutch) ]; Replaces: 6217A Oliver - Fits: [ Super 66, 660 (all using a 9-1/4" clutch) ], 66 (SN: 7085 and up; using a 9-1/4" clutch), 77 (up to SN: 6502; using a 9-1/4"…