The simple answer is no. Given all the agricultural resources that the south had, it would have been prohibitively expensive for the North to import goods from the Caribbean or the rest of the world instead of just importing across the border. Maybe in time they would have, but in the immediate it would have been a tough pill to swallow. The confederacy would also have had a tough time going on its own, even with British and French support. The amount of capital and factory resources that the north could provide would be hard to surmount without massive massive investment from outside sources, of which would not be able to happen, not in the mid-late 19th century when the Concert of Europe was breaking down and also with the amount of investment that was going into India by the British.