Muncie 4 Speed Transmission

Its a m-21 close ratio, 10 spline input, 32 spline output. Case, tail shaft, and side cover are all in good shape (no welds or fixes)... yes there are no grooves on input shaft and it does have a drain plug. The case numbers say it's an m-21 also when in first gear and spin the input shaft about 2 1/4 turns equals 1turn on output. Easy, close ratio transmission. No it's not a m-22 (I wish) easy to tell by pictures of gears. This came out of my uncles running driving 4th gen nova (1975-79) with a sbc 350. Car had light front end damage, I used the motor in my car... comes with hurst competition pluse shift linkage and shifter mounting bracket, and slip yoke. (This tranny is quite a bit heavier built than the m-20 next to it in the picture) works great.