I've just bought a 4320 too and am about to start the conversion process inside. Contact me if you'd like to compare notes!
From:
mopr
(Thu 20 Aug 2009 05:59:20 AM EDT)
Your truck has air con like mine - have you got it working? Presumably it's 230V? Also presumably there was some sort of control box. I have no idea what that looked like or indeed where it was. Can you help?