If your going new injectors I've gotta agree most people are going for seimens now mate, I've even bought a set to replace my greys as they have a better spray pattern. Also not sure If the 4x4 cooler is good for that much power be worth checking on that, most people I've seen with 350+ have gone for a 500 spec cooler. Also has the head gasket been uprated to a group a or mls one?!

Also what turbo you got on there?!