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Hello, I'm new to the form. I was just wondering if I could get some help with my 77 mark v's Vin number and where I can find some good reputable parts. As I have some rust issues. And a vacuum leak that causes the headlight covers to close while running and open while stopped. 460/c6.
 

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If the headlight system is similar to a '74 Lincoln, there may be a pinhole leak in the metal vacuum reservoir located forward of the driver's side inner fender(tucked up underneath the top of the front fender). Hope this helps.
 

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If the headlight system is similar to a '74 Lincoln, there may be a pinhole leak in the metal vacuum reservoir located forward of the driver's side inner fender(tucked up underneath the top of the front fender). Hope this helps.
Sweet ill get to digging around and see if I can find any cracks or worn connections thanks!
 
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