pronouns - Is "you and I" the subject in this sentence?

I know that "you and I" should be used when it's the subject of a sentence, and "you and me" when it's a complement. But I'm not sure about the following phrase:

We are very good pals, you and I.

It would seem to me that "you and I" is a subject here (so I should use "I" instead of "me"). Is that correct?