Hi there all and Happy New Year!

I have an ED 5.0 with which I am
looking to replace my standard manifold
with a AU XR8 one..Now, this one has the injectors as part of the deal
so my question is can I use them or is it too much hassle making up
plugs ect..Also with regards to IAT sensor, can this be fixed for my ED?

Many thanks in advance...

Assuming you have blue injectors with this intake no.
If they are yellow yes, but then there is no point.
However, if the intake is one of your only mods then you don't need to use them...your stock 19's will do fine.
You can adapt the IAT to your current harness.