Thanks, I have been putting this off for too long, this thread is answering questions I have been wondering about.

More questions in the form of assumptions:

So, I can test the overboost switch with a Mityvac and an ohmmeter. At what pressure should it switch?

I can test the crossover valve with a Mityvac and battery voltage? 12V won't hurt it?

I can test the ALDA with the Mityvac and engine running. Engine should speed up with pressure applied?

The no vacuum involved rule really helps. With all of those vacuum lines around there I thought there must be a tie to the vacuum system somewhere.