Im about to do the same thing as your setup but in my '04. Complete AVCS with cam gears, just not hooked up. From the research I have done, I was reading exactly what youve read.. I did have concerns that the timing would be off.. All of the other info Ive gone over shows timing using the STi cam gears will automatically set at zero while not connected. This is much easier than trying to plug the oil holes in the cams.. from what I saw, most peoples "plug jobs" end up leaking.. There are people running this exact setup and have no issues.