If you got a radiator with the hose outlets in the right place you'd be able to run hoses fairly neatly behind and in front of the rocker cover to the relevant connections on the engine.
It may mean that you'd have to put a small vent in your bonnet, but something like a Metro GTi type vent wouldn't look too out of place. You'd also need to move your washer bottle elsewhere, and possibly use an earlier, smaller one.
Other than that I think you'd struggle to get it anywhere else, especially as you could end up restricted on the placement of it because of the routing of water hoses.
Other than that, looking good!
