I did a forum search here but it's hard to find all the info in one place. I'm going to be replacing valve seals in my '03 and want to install the cylinder head cooling mod while I have things apart. I'm wondering what the best method is.. I see some kits that thread in on the back of the cylinder heads and also some kits or homebrew solutions that thread into the rear of the intake manifold on both sides. I'm going to be doing this with the engine in the car so I'm wondering how easy it is to access the back of the cylinder heads this way, vs. taking the intake off (I assume) to put the fittings there.

Can someone provide a link to a good resource on this, or provide your own personal experience? Any help would be much appreciated!