1947 Plymouth powered by chevy, conversion automatic to manual

I have a 1947 plymouth with a 350 chevy motor and a turbo 400.  What would be the best way to convert this to a manual transmission. The brake pedal come from the floor and there is no clutch set up. I was playing with the idea of putting a regular 4 speed transmission or a 5 speed or even a six speed manual transmission.
  I'm just trying to get ideas and how much work and money this would cost.