[md_wild_weasel]

i constantly hear people whine about the p-51 and historically speaking this was a great fighter. But what people forget about il2 is the game doesnt support fuel tank switching which was an important part of flying one of these warbirds. I have a spitfire MkXIV pilots handbook which states when and where to switch to what fuel tank during flight. I am not an expert on Fm nor can i fly for real but people have mentioned that the P-51 used fuel from the wings first, then drained from the fusealarge. This probably explaines the poor handling. For now till some great modder fixes this i would suggest you fly her similar to a FW190. She has great dive speed and is very fast at alt.
cheers.