I've looked a little bit into KA24DEs. the timing cover is much different and there is some differences in the timing gear that may or may not be adaptable. until I see inside a DE inside the flesh I won't be sure.
It may very well be possible to just swap over the head and timing cover but in the long run it would be easier to swap the whole engine. as soon as you swap the head you run into possible problem with piston/valve clearance and other like interfacing the U12 distributor to the twin cam head.
The DE has a funny cam drive setup too, where there is a second chain that drives the two cams from the gear in the 'normal' position. I'm not sure why!
The turbo kits that are available are American which rules out most of the benefit to me. Just look into shipping of one of them and you'll see what I mean