Greetings,
First I want to ask what you consider the difference between cad and yellow zinc. Most of my recommendations are going to fall into the 'light yellow / gold / silver' range for describing the finish. I have seen many attempts to replicate this finish. Some are way too yellow / gold. So for conversational purposes, 'zinc' is silver in color, 'cad' is that yellow / golden / silvery color.
Brake lines and mounting hardware are cad.
Rear brake drums are unfinished natural aluminum.
The differential is painted semi-gloss black - all of it.
The hood latch mechanism is cad. The door latches are zinc.
Most all of the suspension hardware including the drivetrain mounting hardware is cad. The compression rod washers are zinc. Originally, the inspected , torqued, mounting hardware for the suspension and drivetrain was brushed in yellow paint however the compression rod hardware was red paint