Too much vacuum...headlight switch wont move

[J-440]

 68 Charger with the vacuum operated headlight doors.  Everything is new and works.  Problem is, I have to turn my headlights on before I start the motor. The switch is easy to move, the lights turn on, I crank the motor and then the doors open.  If I were to already have the engine running, the switch is too hard to push because of the excess vacuum. 
  Now, I have EFI and the intake has 2 ports, 1 for the MAP sensor and 1 for the fuel pressure regulator.  I originally shared the MAP port with my headlight hose using a "T" fitting.  The engine is highly modified with only 8.5:1 compression.  Is there another way to put this hose?  I thought about a carb spacer with a hole drill and tapped and also the electric headlight conversion kit.  Any place I can drill and tap a hole through the air cleaner assembly?  Thanks.

[J-440]

 Or maybe some type of check valve going in between the vacuum lines to the intake shared with the MAP sensor?

[oldcarnut]

Would an inline vacuum regulator something like this (but there are many varieties) work? 
http://www.ebay.com/itm/NOS-Emissions-Vacuum-Control-Regulator-Assembly-1978-79-FORD-TRUCK-D8HZ-9F490-A-/400860373485?hash=item5d5523e1ed&vxp=mtr

[c00nhunterjoe]

How much vacuum does it have at idle? Sounds like a faulty switch.

[myk]

How much vacuum does it have at idle? Sounds like a faulty switch.

That's what I'm thinking.  My car is pulling 19" and I have no problem moving the switch.  However, when it was NEW it was a pain in the butt to move until it loosened up...

[J-440]

 Ok I figured it out. I made a sleeve with a smaller hole through it, cut the main hose and shoved the sleeve in between the 2. Just decreased the vacuum is all. Works great now.

[J-440]

 Well dang it.  I'm pulling 17 inches of vacuum and the switch still won't move.  Only way it will is if I pinch the hose then the headlight switch will move and the doors will open.  Problem is the doors won't close.  Does the switch have to be broken in?