Juzz--
I am not saying you are wrong. However, I have NEVER seen any clarity at all regarding the performance of the P-51H. Every source I look at says something different. Even two sources from the USAF quote widely difference performance for the P-51H.
That is why I did not attempt to provide exact numbers. I can't find anything "exact" that I can trust. That lack of consistent data, IMO, would be the largest stumbling block to modeling the P-51H. Everyone would have a different opinion of what the plane is capable of.
For example, in terms of absolute maximum top speed, I have seen figures everywhere from 465 MPH to 490 MPH. The 470 I stated is a guesstimate based on roughly what MOST sources seem to say.
As for maximum horsepower...I have never, until your post, seen any figure over 2000 horsepower. And, here I have to question, because the P-51H used the same engine as the P-51D did. I am NOT saying you're wrong; it may be that P-51H's were modified at some point. Once again, I have yet to see any agreement at all between sources on the subject of maximum horsepower for this plane.
Same story with climbing ability. All I can say is that almost all sources I have state over a 4 k/min initial climbrate; also most of my sources state that one intention of the P-51H was to improve the climbrate over the P-51D.
You are correct, though, in that a matchup between a P-51D and a FW-190A-8 is essentially the same end result as a matchup between a P-51H and a late-model FW. Which is actually my point--the P-51H is good, but compared to its comtemporaries it's no superplane.
Also: I personally don't care if the P-51H is never added to AH (likewise I don't care whether they add a Ta-152). All I want to do is dispel any myth that the P-51H is some sort of superplane. Good it is,but no better than its contemporaries (marginally better at best).
J_A_B