Easy job. You can do it with a hack saw and a hand drill. You also need a muzzle refacing tool, a proper mandrel, and a crown lapping tool. They're all available through Brownell's and aren't that expensive.
Or, if you have good hands, you can cut the barrel, you can use an ordinary drill bit to crown it (but if you can grind one of your own to create a mandrel and a 73 degree angle to crown it), burnish the crown with a brass screw, and face the muzzle with files and emery paper. The way they used to do it. Remember, anything over 800 grit will be hard to blue (too smooth to take the process).