If your plans for a streamliner are other than a slab sided or flat bottom shape I would suggest looking at the NACA 66000 series profiles in revolution. These profiles were designed to provide long runs of laminar flow which is the lowest possible drag regime. Of course you still need to have a good rear end shape, not like Tony's avatar!, to make it all work. Look at the build thread for Rob's NACA 6600 stream liner for some ideas.
Rex