OE replacement 5/8" long shifter saddle bushing for SR4 / RAD internal rail 4-speed transmissions as found in: 1974-1978 Ford Mustang II 1980-1981 Jeep CJ 1976-1982 AMC cars 1976-1987 Chevette & T1000 - 4 speed only (RPO MY1) Fits some Australian single rail applications - measure first! Ford...
That doesn't look like any of the shifters I've removed from 4 speeds from any II I've worked on over the years. They all had a baseplate that was bolted to the tail shaft housing that had 3 bolts.
They looked like these in the pics taken from the link that @Enzio provided.
I think I have an old shifter or 2 somewhere in my parts pile. If I can find one I'll see about taking better pics of what I'm referring to. I don't remember seeing a bushing like that either. I'm guessing this is a transplant in another application too since that doesn't look like the tunnel of a II. Any chance it's a transmission from something else, like maybe a Ranger? Are there any tags or maybe casting numbers you can reference to locate what, exactly, this transmission is?