I am moving to Nhulunbuy in a few weeks and have just recently blocked my EGR and installed a Dawes Valve and Needle valve in my GU as well as a catch can and intercooler fan. It took my Dawes about 2 weeks to arrive from the USA so if you can wait I can give you a hand. Have you ordered a needle valve as well??
I made a number of changes to the old girl this year and the difference has been amazing. I think the new exhaust and dumping the air purifier/ Cat has made the most noticable difference.
Having removed the inlet manifold and seeing first hand the build up of gunk from the EGR, blocking it is well worth the small amount of effort. I now have no boost spikes with the Dawes and needle valve installed. I have sent you a PM with my email address.