Need help identifying these please

Hope someone out there with access to a '74 Duster service manual can help. I'm working on my '74 Space Duster's engine bay trying to clean up and eliminate unneeded wiring. I suspect this may be a California spec car but am not sure. There are three components mounted on the drivers inner fender that I have not run across before (red arrows) and need help identifying. I would like to eliminate all three but haven't a clue to their function. The middle one is some sort of vacume activated switch (off the manifold) which is wired to what looks like a relay which is then connected to the starter relay. The far right switch's wiring disappears into the firewall harness and then ???? Thanks in advance...