Anybody replaced them with the intake on?

One of the things I like to do when I get a new car, is to replace all the fluids and tuneup parts and since I do not know the history of this car, I would like to replace the PCV valves, as the car has almost 30k miles.

 

Sorry to sound pessimistic but I have the inlet manifolds off and it still looks all but impossible unless you have small hands. If I am not mistaken they don't seem to last very long anyway. Have you thought of fitting an oil catch tank in the pipe? There are some posts on this modification elsewhere. This is probably the route I will follow eventually.