Replaced HVAC controller. Does anyone have a schematic for the vacuum control system?

[NDSopp]

I replaced the HVAC controller in the dash with new after a mechanic told me that was the problem.  It wasn't, the air doesn't redirect from the floor to defrost or dash vents when adjusting controls.  I did find that when the carburator and intake were replaced with a Holley Sniper EFI the vacuum line to the controller wasn't hooked up.  I hooked it up and tested the check valve on the firewall.  It still doen't rediredt air.  The Hot/Cold slider does work, the fan switch is new and works.  My thought now is look at what the HVAC controllers vacuum portion is connected to.  This is where I need help with a vacuum schematic or shop manual notes.  Help...it's even HOT in North Dakota.