Pre-Unit Case "use or not"

[latte hardtail]

Well..., I had posted a few weeks ago about my purchase of a 1960 Pre-Unit and now after taking it down to nothing, find out the case has a couple pieces missing. An experienced semi-local guy to me said from the pictures it could be used, but if I'm already this far into it that maybe I should look for another case. There are no cracks that stem from the break or pieces to be found inside; so it must be from a previous rebuild.

I have attached photos for you comments, experience, and expertise.