This is a very tricky one.
Was it an original car that was built by MMC at Malvern , with an original chassis number?
Was rebuilt in the USA as a result of accident damage, and therefore have an earlier identity.
Was it an earlier car that Dennis has re-engined with the latest Cyclone power plant ?
If it does not fit any of these (or other similar scenarios) , then it looks like the purists would rank it as a Morgan based kit car , albeit a very nice one.
None of this need concern you if you like the car, and want to keep it forever. It is only when you come to sell it that the problem will appear. I am afraid that although "originality" is possibly much less important in Morgan circles than other marques, as we all tend to modify our cars to suit our needs or tastes, but a car that did not get built at Malvern would be a step too far for most Morgan enthusiasts , so I would expect it would affect the value quite significantly.
Others may have differing opinions , but that is my 2 cents worth.