Hey, I have just secured a newer 2008 model 4.8 (TB48E) engine to replace the dead 4.8 in my 2002 GU III ST. What should I look out for when we do the changeover? I am thinking to put in a new set of oxygen sensors with the new engine. Should I clean out the inlet manifold of the new engine which have done 80,000ks? What other things should I do beside changing them over.. any information will be appreciated and thanks to some of you which I have learnt a few things from this forum. 