I finally found the Chilton reference that Elle provided and now have a
somewhat better understanding of the Aux. Intake Valve function.

Before I dive into the carb or do a valve job, I think I will revisit the
vacuum hose "jumble".. I am greatful that (i appears) no one else has messed
with these and if I trace and replace them one by one, as necassary, I may
eventual correct the problem. (Hoses are cheaper than an unnecassary valve
job.)

BTW. I opened the cover on one of those the two vacuum control "Black
Boxes".. Amazing at what is/was involve prior to fuel injection/computers.
Needless to say, I didn't tamper with any components in these boxes.

Steve