hkspwr_rx7

i was thinking about upgrading my turbo and fuel system but about the fuel system part, i dont really know anything about it but the turbo part i was thinking about upgrading to the hks t51r because i like how it sounds when it spools and etc....so would that fit onto my motor or it requires modification and in otherwise what turbo can i run in order to drift and drag with.....oh and is there any such thing as i can switch boost between drift mode and drag mode.......what is the best psi for drift and drag???...i need help???