erg, just for information it's "jargon" and we call them electric motors not engines.

It's probably easiest to go with the GWS EPS300C setup, which is similar to a geared S280. Lots of people sell them complete with battery, speed controller (which you'll also need) and propeller. Try somewhere like Hobby Lobby.

2 channel RC is not enough, you really need 3 channels. Rudder (or ailerons), Elevator and Throttle. If the servos you have are standard size they will be WAY too big for that plane.

You'll want to be careful about the weight. In my experience Guillows kits often contain very hard, very heavy wood and build up really heavy. Not good for flying.

BTW unless you're pretty experienced flying RC a small warbird conversion will be a real handful. I'd get something much simpler to learn to fly with first while you're building the Dauntless.

Steve