As far as the vacuum related to the power steering idle up valve, I was able to find a schematic showing the vacuum hoses. There should be two of them. At an idle, if you turn the steering and pump pressure reaches a specified point, the valve allows a metered amount of air to bypass the throttle plate causing the engine, idle speed to increase.
Take a look at the schematic and the pics and let me know if that helps. Also, the last 2 pics are how to test if it is working.
See pic below.
Images (Click to enlarge)
Sunday, January 23rd, 2022 AT 2:55 PM