Ahem!
According, to account s I've read, the P-51H first flew on February 3, 1945. While it saw production and delivery during the war, the war was over before it saw combat. I wish It had flown during the war, as it would have been quite startling to its Axis opponents. I think that's why you don't want to see it here.

I disagree with the statement that the B model was more prevalent (I think that's what was meant) then the D model.
It was my impression that the D/K model was produced in more numbers then any other variant, or fighter aircraft for that matter (save trainer aircraft and perhaps all versions of the P-47), but I could be mistaken. At any rate, the figures are impressive. 8100+ D models, 1600 of which were built in Texas. The skies of downtown Germany had frequent visits by Mustangs.
Japanese held territories probably saw more B and C series, at first. On that note, the first few books I ever read on P-47's and P-51's indicated a lot of use for a napalm type ordinance that we don't see on AH. I'm not sure how that would work here anyway. But I'm expanding this thread.
The K model limitations juzz mentioned were quickly recognized. While the D model had the Hamilton Standard cuffed prop, the K was fitted with a hollow Aeroproducts uncuffed blade. 20% of these were not useable and they were replaced. Inferior? I don't think it mattered long enough to be considered inferior.

Oh, and later D models had an uncuffed HS with blunter tips. 1500 K's were built in Dallas, which is what the 'K' means.
I don't really want the H. I think the H is not quite the handsome ride the D is. I think the D is just fine, as long as that's what HTC wants. It's all I need!

But, if you do introduce an earlier variant, I vote for the P-51. No bloody A, B, or C! I would ask for the A36 Apache, but this is a Mustang we're talking about!

I would love to be flying a D model, when I killed an H. heh
Voss 13th T.A.S.