SFIC:Why was Ghost correct then (implying it was God's True Word), but not correct now (implying God's Word became a lie)?
I'm sorry; I shoulda elaborated more. Since the KJV was released in 1611, it was in the English of 1611, and 'ghost was correct THEN. But in the times later Bible versions were written, the meaning of 'ghost' had changed. It was no longer correct, for example, when the NKJV was written, to call Him a ghost.
If you're READING ALOUD, or otherwise quoting the KJV, it's entirely to call Him the Holy Ghost, as that's what was then written. But when discussing Him in modern English, or in writing a Bible version in modern English, it's no longer quite correct to call Him a 'ghost'.
BTW, you asked me if I know of any verses in the 1769 KJV that read 'spirit' where the AV 1611 reads'Ghost. My answer: I DON'T KNOW. I have never done any comparison between the two editions to look for that difference. Since you mentioned that, I might do such a comparison when I find time. But as of right now, I'll hafta say I doubt if I will find any such differences.