It's the brace in the bottom left of this picture. Apparently I failed to get a good before picture.
I started by removing this spring and the cotter pin that connects the clutch pedal rod to this Z bar.
I then pulled that rod out and removed the bushing.
There is also a spring and cotter pin assembly that connects the bottom of the Z bar to another bar that connects to the transmission. (I again failed to get a picture of this.)
This bolt goes into the engine end of the Z bar and screws into the engine with a 3/4 End box wrench.
It looks like rust has taken the place of a bushing on this end. Ugh.
It's out now which just leaves the accelerator linkage and two engine mounts connecting the engine to the car in the engine bay.
I plan to pull the transmission with the engine, so I still need to pull the driveshaft, pull the shifter, and loosen the transmission crossmember before I can pull the engine. I also plan to drain the oil and transmission fluid just to avoid as much mess as I can.