Originally posted by Karnak
That doesn't answer the question unless years are the smallest time units we can work with.
The Malcolm Hood was not available on the earlier P-51Bs (and apparently never available on P-51Bs in the Pacific). This means that in the time frame the P-51B is likely to be used (excluding the flay whatever you want MA) is to cover the period prior to the P-51D's introduction. After the P-51D is introduced it will almost always be used. So having a P-51B that is only correct for the time period after the introduction of the P-51D doesn't make a whole lot of sense.
In fact it is very much like having the Bf109G-6 equipped with a Erla Haube.
Malcolm hoods were a never factory item. They were installed initially at the Squadron and Group level, and later at depot level. I have photos of P-51s with Malcolm hoods dating to early April, 1944.
You won't have to worry about Malcolm hoods in the Pacific as no P-51Bs served in the PTO or SWPA. P-51As and later, P-51B/Cs served in the CBI. However, as the Malcolm hood was British made, you would not find them in the CBI. In fact, I don't recall seeing any on MTO fighters either.
At the Dallas plant, the P-51C remained in production until well after D models began being delivered. These were contemporaries and were being delivered to fighter squadrons thru mid-summer 1944. For TOD, the Malcolm hood is a legitimate configuration, as long as the set-up is post 1943.
Believe me, with or without the Malcolm hood, the P-51B will dominate contemporary Luftwaffe fighters in TOD scenarios. It's that good. With or without the Erla Haube canopy, the G-6 is out-classed by the P-51B. Especially at 25,000 feet or higher where the P-51B is much, much faster, better climbing and better handling. Which is why I do not expect the G-6 to be pitted against the P-51B very often, but against the P-47D-11 and pre-1944 P-38s.
If HTC wanted to include a P-51C with the standard canopy, no one would object. However, that's unlikely in the short term, so people will just have to accept things as they exist.
My regards,
Widewing