Yeah it should fit, though there are a few caveats to that. (Obviously, as I'm sure you realised, a 360mm radiator will not fit)
You can mount the rad in the roof or in the front of the case.
Mounting a 240mm rad in either position means removing the ODD tray.
As I understand, you'll need to work out how to mount the pump/reservoir yourself.
Even in a windowed Prodigy, if you pick a long graphics card you won't be able to see the fancy reservoir however you mount it.
As it's pretty much in a class of one, there are full cover waterblocks for the Impact, which you might want to look at.
If you aren't going to use the CPU block from the kit due to the point above, you might be better off buying components individually instead