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As it says on the tin. With a POD after 1750 or so, try to split the former *British India into two states, one north, and one south. You can use Tony Jones's Gurkani Alam as a reference, if you like.
The only other condition for this scenario, is that the India's must generally not be too much more expansive, combined, than what the real world India was prior to the creation of Pakistan and Bangladesh(so, no North Indian Tehran or Thailand, South Indian Indonesia, etc.).