My words of wisdom..Keep the ignition battery and switch as close to the engine as possible, as far away from the receiver and battery as possible...Most of my conversions put the ignition inside the mount, so the spark plug wire is only about 4 inches long, with a rubber boot...I use a nyrod from the throttle servo to the engine..the throttle servo is about on the c.g. of the plane..All my conversions use a rotated carb so that the nyrod is a straight shot to the servo without bell cranks....
Check out the C&H website for the best info on interference....