Well it could, it would just be a LOT harder to do that way. If it's a truck frame, it already has all the suspension points, motor mounts, etc that you would need to do something like this, not to mention the years of experience people have with lifting big trucks. If it's on a limo frame, everything has to be started from scratch, which means tons of r&d and testing to get stuff to work at all, much less work reliably.
It's possible, just not likely.