72-93 truck clutch linkage questions

The other bracket is probably for the frame/body side z bar pivot, which I didn't see in your pictures.
You'll also need a tension spring (goes from TOB arm to a notch in the bellhousing, IIRC). Can probably find something serviceable at the hardware store, no biggie.
Pedal pads are available at Van's Auto.
It has this bracket on it. Looks like it would bolt to where the auto linkage bracket went.
57E1E6B1-7899-4E03-807E-D96559256C2F.jpeg
The auto bracket it laying in the background.