WHAT YOU ARE VIEWING IS A OEM MUNCIE M-20 4 SPEED INPUT MAIN DRIVE FINE 26 SPLINE, WITH 21 TOOTH, 2.54 1st GEAR RATIO.  THIS IN NICE SHAPE. THE ENGAGEMENT TEETH ARE IN VERY GOOD SHAPE, THERE ARE A FEW CHIPS ON A FEW SPLINES OF THE INPUT (SEE PIC)  WHAT YOU SEE IS WHAT YOU GET. THIS WILL BE SOLD AS IS, WITH NO RETURNS. LOCAL PICK UP IS WELCOME. IF YOU HAVE ANY QUESTIONS PLEASE FEEL FREE TO EMAIL ME.