the trickiest part is making sure you get a good tight fit on the short hose joining the thermostat. You need to take this off too so get a gasket for this aswell. I'd also advise getting two of each gaskets incase anything goes wrong.

Oh and take note of whch way the alternator belt goes on. I forgot and it took me ages to realise

It will take 3 or fours hours if you take your time and it looks like it would be far easier without the rad in as you can come through the front rather than contort your wrists.

Paul