Muncie Identification | The H.A.M.B.
Feb 21, 2010· He believes it's an M-21 out of a '68 Oldsmobile, though he can't say for sure. I've searched the internet but I am finding conflicting data. Can anyone help me identify which Muncie model this is? I'm fairly sure it's not an M-22, as the input shaft has two ring grooves on mine, while the M-22 is supposed to have none.