$$$$$ It ain't gonna be cheap!!!!
You are talking 15 to 20K worth of parts if you assemble it yourself and want it to live. Callies Magnum or Crower crank and GRP rods would be a good place to start. A block that will handle a very large bore with a short stroke would be the next to look for. And premium valvetrain components will be a must.
Now, why spin it so high? A lot of power to be made these days without resorting to high RPM.