I found the specific post for you:
https://www.puritanboard.com/threads/a-history-of-the-authorized-version.31573/post-388956
It's a tedious process. If you look at the special link to any post on the current platform, you will see that each post is assigned a chronological number based on the exact time it was made. JB's post is the 388956th post made on the PB. I saw that, to go to a specific thread, you don't need the thread name, only the number; they are also in chronological order from when they were posted. If you go to
https://www.puritanboard.com/threads/31573, that is the thread in which the post was made. To get there, I first guessed a thread number, let's say
https://www.puritanboard.com/threads/30000. Then I look at a post's link to determine how close I am. That page has only the main thread, no extra comment, so it is not useful.
https://www.puritanboard.com/threads/30001 does have extra comments. The first comment is
https://www.puritanboard.com/threads/did-st-Paul-parse-verbs.30001/post-364918. So we are 24000 comments before the one you were looking for... From there it is a matter of zooming in until you strike the jackpot. Note that, within a thread, the post numbers do not always follow directly, because other posts were made in other threads on the same day.
