Wyld the glow plug timer mod lets you control how long the glow plugs are on for. I think, i think, they continue to stay on after the car has started for around 3-5 minutes. I can't remember the exact time. Anyhow having them on too long tends to kill them prematurely, plus the extra heat in the cylinder mustn't be that good for the engine too. So there is a mod to override all this. The timer can be had from Jaycar and the wiring isn't too difficult I believe. I haven't done this mod. I probably should but as always there is other things on my list.
As for the OP. I would recommend removing the EGR plate if you don't have an EGT and boost gauge, plus the dawes and needle valve fitted. Because you may experience limp mode because your engine may now over boost because of the EGR block.