Not the P-51. Here's the bonus clue, which will distinguish that airplane.
Looking for the name of a warbird.
1. Thousands built.
2. Flown by many countries.
3. Designed and the first prototype completed in less than a year.
4. It was not a modification of an earlier airplane, but its wing and at least part of its tail feathers had been used on earlier designs. Only the fuselage was entirely new.
5. Tricycle landing gear.