OWNING ONE MYSELF, they are actually rather rare.
From the research I've done on them, it appears the military only 'modified' about 300 of the M1028's into the A2 dually configuration. Another 400 or so as the A3 config.
It's your truck. But I've yet to run into another one in the three years I've owned mine.
And every time I drive it SOMEONE always asks what it is. This is even more true if the person is ex-military, because they all say they never saw one before.
You can take an M1028, modify it with a dually rear end, but you will find that the truck you have IS rather rare. It would be a shame to make ONE LESS of them as they were 'modified' to be what it now is.
Oh, and I have found MINE to be the best driving, riding CUCV I've owned. And I've had an M1031, an two M1009's.
The reason I DO like mine is it was the replacement for my deuce. It can do a lot that the deuce did (like pull my MKT-75A), but I can work on it myself without needing soldier B so much.
ONCE it's no longer original, it's just another modified truck. They are only original once.
How many M1028's did they make? Very, very few were ever modified to this configuration.
Your ride. You do what you gotta do. It does appear you've done one M1028 in this config already. There is supposed to be a guy down near Ft Hood that has the conversion axles and all the stuff to MAKE an A2. You would have to get one of those to make your current M1028 into an A2.
And your is a VERY NICE EXAMPLE for sure.