I run my 70 with the 2 headlight door springs working against brackets attached to those same grill bolts! Now the headlights stay closed indefinitely with no vacuum, but still have some spring assist to help the vacuum actuator open them. If the actuator were ever to fail and the headlight covers wouldn’t open, I can just move the springs back to the factory brackets closer to the radiator, and the headlight doors will again open with no vacuum. It was designed that way originally as a fail-safe so you still had headlights in the event of a vacuum system or actuator failure.
