30 Ford header

[Aster]

I'm putting the body header on my Model A. Everything fits pretty good except at the top. The metal piece on the front of the header that covers it is about 1/8" shorter than the wooden header. There was nothing there, so I have nothing to refer to. The visor lays over the top of the header and I assume the these two pieces join to provide a seal against the elements. I hope I described this accurately enough. In other words, when you look at it from the front, the wood sticks up 1/8" higher than the metal "Flashing", for use of a better word. Does anyone know if this is correct? Does the flashing piece have to meet the visor flush? I'll try to get a picture to help out. I've looked at a lot of A's and I'd like to somehow overlay this area with fiberglass to ensure a weather proof seal. Does anybody have any recommendations or websites to refer to?

[Aster]

Here is a picture of what I was talking about hope it helps. Thanks in advance everyone!