The war wasnt fought by spit14s on 150 octane...
Imagine that plane: 400mph otd, possibly about 470 at altitude (just speculation), can turn around in 16 seconds on an 550 yards circle, has dual hizookas + 2 MGs, can climb with about 5500feet/min...
That would be perked to 100. The spit14 in that config would beat the Tempy in everything but guns.