My kind advice to Mr. Kailash Krishnan is, do not aspire to convert to brahmin just because you desperately want to marry this iyengar girl who seems to love her iyengarism than you. perhaps you are infatuated with this iyengar girl. does she truly love you? if yes, she would marry you regardless of her parents' acceptance. if she would marry conditionally, i.e. only if her parents would agree, then you may conclude, her love for you is not genuine. if she does not love you more than her iyengar caste or parents, then i advise you may better forget her, overcome your infatuation for her, seek out a girl who loves you genuinely and marry her. My best wishes.