bud cab still stunped

[larry harding]

i posted a while back about a 30? 31? pickup i am restoring, i got a lot of good info from you guys and thought i was on my way until i tried assembling the cab. here is what is going on.
1. there is a 1/4" gap between the top of the windshield posts and the lower edge of the roof.
2. the holes in the visor flange are about 1/4" above the matching holes in the windshield posts.
3.the screw holes in the header are about 1/4" above the holes in the angle above the windshield area.( i notched out the angle holes trying to get things to line up)
4.the lower board in the header is 7/8" thick and the holes for the 5/16" screws are centered at about the level of the top of the bottom board.

it is as if the bottom board is 1/4" too thick, but this is supposed to be the header used on the 30/31 pickups and tudor. i even borrowed another cowl that is supposed to be for a 30/31 pickup(painted band instead of ss)... same problem with the holes in the header being above the holes in the angle. before i try to shave 1/4" off the header or put patches in the gap between the was post and roof i am hoping someone can look at there header and tell me what is wrong.