I would start by either improving the OCR, or piggyback on GCV/Amzn, who have better tools. For instance, what if I drag-and-drop their sample image to this demo page https://cloud.google.com/vision ?

All text is recognized, and as far as I can tell, there are no errors.

There are a lot of difficulties with older text, but I would start with low-hanging fruit such as trying to use better tools. On top of that, you have the problem of making sense of the layout, fixing common typos, etc.