Repro windshield frame header

[69-72]

So I am working on installing one of these and here are some tips on installation and some issues I have run into.

First thing I noticed taking it out of the box was a series of about 28 holes that need to welded up. They seemed kind of odd to me so I inquired with the producer of this piece and I was told they holes are there to assist in the forming. Seems odd that the holes aren't pictured in any of the product photos.