Who the heck is Skubone? I can't find any stats for this guy. So, either this was in an HTH room, or in the DA.
As it is, skubone has little experience which is evidenced by many factors. No flap usage to gain angles. Repeated snap stalls/spins. A lack of awareness. No throttle management, etc.
1 v 1, Co-E, Co-alt, the 190A-5 is outclassed by the P-51B. You have an edge in sustained climb (but not at medium or high altitude). Contrary to popular belief, the 190A-5 does not accelerate better than the P-51B. Given equal range of fuel load, the P-51B actually accelerates a bit faster. You do have an advantage in roll rate at low to medium speeds. But on the whole, you are in a hole in terms of performance. So to win, you need help from the enemy pilot, IE: mistakes. Skubone made many. You did well to take advantage.
As it is, the P-51B is one of the very best non-perked fighters in the game. In some respects, it's better than the perked prop fighters. Those who fly both often consider it superior to the P-51D as a dogfighter.
My regards,
Widewing