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kwhizz it looks like you know what you are doing here, just a heads up on the speedo cable. if you decide to go with the original type speedo cable that enters the trans on passenger side, don't forget to drill the 1" hole below the accel linkage. there is also a dimple on the passenger side of tunnel for the cable bracket to drill. also i found that i could not just change the tailshaft housing on mine because the speedo drive gear on the M-21 main shaft was not in the same place. not sure if that applies to all M-21 trans? dennis