For 67 the original shifter was ITM and was mounted to the crossmember. Some of the handles had Muncie engraved in them others not. Ironically you could get a Saginaw transmission where the shift handle said Muncie, go figure. Pictures would help identify what you have. The reverse lockout consisted of a cylinder that popped out a bunch of ball bearings against a spring. Likely the spring is broken and bearings are lost.