We are reformatting a 125-page book from a 4.9" x 7.2" page size to a 5" x 8" page size. The current (4.9" x 7.2") format is print ready. Changing the page size to the new 5" x 8" format obviously requires a few adjustments/corrections. Most pages require no format corrections.
The task is straight forward: Use the existing 4.9" x 7.2" as a formatting guide. Make necessary corrections in 5" x 8" format so as to have same page breaks, correct pagination, same (or close to same) fonts, etc.
Once corrections are made, convert Word document to printable PDF then deliver both formatted Word document and PDF document.