It's a addition to the deck surface of the block then you punch it and sleeve the bores, Then stroke the bejesus out of it. In theory it should be good more some pretty crazy torque in the lower rpm range.
That's one thing these motors don't seem to like (crank or mains).......
It would also necessitate custom intakes or something like the Banks Big Hoss system as the heads will now be higher and further apart.
i have yet so see any stroked dmax out perform a stock stroke truck.
If someone puts the time and money into making one outperform a stock stroke truck it will happen. It may come at a price that doesn't justify the performance gains but, there is no replacement for displacement.
For all you know there's an untapped 20% torque increase there. I'm sure there are a few that would pay quite a bit for that.