1968 - 1970 Muncie M-21, Close ratio (2.20 first gear), 10 spline input, 27 spline output. Main case #3925660 Tailshaft case #3857584 Side Cover #3884685. I bought this rebuilt with new synchro's bearings etc, ready to go as a back up for my Anglia B/Gas car. Fortunately I never hurt the race trans so I never ran this. I have since sold the car so I don't need it anymore. I see these selling rebuilt like this for anywhere from $1100 to $1800.00. I am asking $950.00 for this one. You can PM me here, email [email protected] or 909 912-2156 Don