1. Look at the wing dihedral. Rudder-only planes generally have lots of it, at least 5 degrees per side. Aileron-only planes need less dihedral, generally 1-2 degrees per side. So the conversion may require reducing the dihedral angle for good handling.
2. Planes in the parkflyer size range seem to turn better with rudder control than aileron. Aileron-only control will probably benefit greatly from an aileron differential setup. That means setting them so there's more "up" travel than "down". This might range from 25 to 50 percent less down than up.
3. Routing tailwheel control from an aileron servo sounds tricky. Will the wing be removable? Trickier still.
4. I'd recommend (based on several poorly conceived kit bashes) buying an aileron-equipped design if that's what you want and leave this one as is. I've gained a lot of respect for the designers' skills compared to my own. When you've gained enough knowledge and experience to do a successful conversion of this type, you won't bother asking for our uninformed opinions.
5. Not an expensive model, right? If you feel like experimenting, have at it!