An even better approach is to just change your religion. I was born a hindu dalit but I converted and so have many of my friends and family. Religious conversions have become so common in India that states have started to bring out laws to curtail it. Casteism is a construct of Hinduism and other religions don't suffer from it in the same way as Hinduism does. So you can change your religion , your name and claim that you have no caste. Hindus have no problem seeing a converted christian as equal to them, but will refuse to see people from their own religion as equal.