If I were you I'd either make it up as I went along or twist facts so badly to meet my agenda that one couldn't recognize them.
If I were you, I would make this allegation without bothering to post facts of my own, and without calling any attention to the fact that this evidence have been posted by myself many times before.
You cannot get around it. The Southern states were producing the vast bulk of imports to the United States. The revenue to the FedGov was based on import taxes, and most of that money was coming out of their production, not that of the North.