I did a production of the Diary for Standard Ebooks[1], it’s still the longest thing on there (amazingly enough given that we also have The Decline and Fall of the Roman Empire). Phil from pepysdiary.com was a big help and pointed out a bunch of OCR errors that he’d previously fixed for the site, which I flowed straight back into the SE production.

[1] https://standardebooks.org/ebooks/samuel-pepys/the-diary