Do you know the wall thickness of the blades at the dropout end? One concern would putting a disc brake mount on such thin blades. Even a fully integrated mount can cause a stress riser further up the blade. Good chat about that here if you missed it.
In that thread there’s a recommendation for tandem stays the Nova used to sell to be used as disc fork blades but they’re butted from 1mm down to 2mm (!) at the small/dropout end.