Tariffs were uniform in the both North and South. However, if you're referring to the fact that upwards of 90% of all tariff revenue was collected in Northern ports, indicating that the overwhelming majority of all imports were destined for Northern consumers then you are correct and there was an imbalance. The North paid the bulk of taxes on imports.
If your claim is that the South paid a higher tariff than the North did then you're incorrect in that claim.
>>>... if you’re referring to the fact that upwards of 90% of all tariff revenue was collected in Northern ports, indicating that the overwhelming majority of all imports were destined for Northern consumers then you are correct and there was an imbalance. The North paid the bulk of taxes on imports.<<<
Approximately 80% of tariff revenues fell on the South, while about 80% of the expenditures of the revenues benefited the North.
Some good articles on the Morrill Tariff:
http://www.lewrockwell.com/dilorenzo/dilorenzo17.html
http://www.ashevilletribune.com/archives/censored-truths/Morrill%20Tariff.html
There was also a FR article/discussion at:
http://www.freerepublic.com/focus/f-news/1069109/posts