I have done the mods in my holiday and its perfectly doable. Just make sure you have enough exta coolant lying around as well as a number of bolts of different diamter, to cap of things. Also order a spare coolant neck, beause the rubber ring inside will wear over time, making it leak coolant.
I also have an AUQ engine and the
guide isnt that different. I forgot to unscrew the coolant cap before removing the CTS and got sprayed lol
Dont make that same mistake! I also removed the brake booster, it seems the suction pump also fails quite often.
Its great to access the vacuum system without
problem (less clutter), also the SAI pump is gone which helps performance a bit due to a lighter car (albeit a small enhancement hehe).
Read the
guide a couple of times and just start, good luck!