The thing is........the perennial question.......when is a 4/4 not a 4/4??
In the past as far as I know, the 4/4 didn't go beyond 1800cc. * but see below.
The 1800 Duratec 4/4 is said to be a jewel, but was only produced for a short time.
* The 4/4 75th Anniversary dropped right into this conundrum being a 2-Litre 4/4, but also a narrow winged Plus 4 with 4/4 wheels...............
There was/is one of these for sale at Ledgerwoods.
These Morgans are superb having a blend of balance with performance....... Obviously I'm not impartial.

So if MMC market the narrow Plus 4 as a 4/4, I would like to see the Plus 4 marketed with more power to maintain the differential. Maybe to Clubsport spec or beyond........
That shouldn't be such a big deal to sort out?