Inland Mfg was a supplier to the auto industry and manufactured the infamous "Muncie" shifter.
It had a number of design, engineering and manufacturing inadequacies, the most egregious being that it was not mounted on the transmission but to the trans crossmember. Under hard acceleration the engine/trans would twist slightly causing the shifter to bind. After a few hard shifts the knob mounting stud would snap off, perhaps sending your hand into the dash. With age the reverse slider, all of 1/8" thick at the gate, would break and rotate forward preventing shifting to reverse. Even when new neutral was hard to find. Cars built with a console had the shifter area covered with a black plastic plate that moved with the shifter. It would rattle and was immediately scratched and worn.
Just about every period magazine road test of a 4-speed Chevy complained about the shifter. If I bought a flawless original 67 or 68 Camaro that still had it I would remove it.
POS = piece of crap