I have no idea, but i think this won't work out for most people. you must have broad mind to accept other caste practice in their walk of life and that party (the caste which you select) must be ready to follow or not oppose your way of life. This is the main thing to be observed. Normally same caste people marriage itself is a big problem to co-operate between themselves and lead a smooth life.
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If both families agree and approve this relation then there should be no problem. Nothing is wrong in it. Now a days the trend is changing. There are many people who don't mind inter-caste marriages. For couples living in an open-minded society as this, comfort and acceptance in the lives of their near and dear ones can be achieved. If you want to abolish this system, inter-caste marriage is the best way to do it. but in villages. where stringent caste rules are there, it might create problem for entire society, but not in cities. Caste system is created by men like you and me. Inter-caste marriages are not new even in mythologies..!