[Guest]

In short, the P-51H is already being worked on, better means superior, and Rjel, come off it. You know we don't agree, so shut it. For all of you asking for performance improvement proof. I read somewhere, from a legitimate source, not Wiki, that the late Mustang IVa, the Brit re-named P-51K, in this case, Block 10, had a top speed of around 442-445mph at altitude as compared to the D's 437-440mph at altitude, so hah... I just can't find the link right now, so sorry...