Trying to understand Manifold choices

Are you saying that you WOULD change it back to the original and keep it that way, right?
If it was original, yes. I wouldn't change it now though if it runs good. I remember it has headers, but whatever intake it has now, as long as it runs good, I'd leave it alone. Unless of course you want to make a cam change and blah blah blah. But if no blah blah blah, I wouldn't mess with it.