Sort of like this:
Don't get wrapped up about 3-way & 4-way connections. What matters is what is connected and what order they are connected in.
One source for SAI, flapper, and transmission cooling line.
Check valve to:
Vacuum reservoir
Changeover valve to flapper.
Changeover valve to SAI valve.
Changeover valve (23) to water valve (12).
One source for Fuel pressure regulator.
One bigger source for brake booster vacuum with venturi tube:
Simple. Ask questions from there. Need more labels?