drain a/c system. remove fan, fan stator, remove belt from a/c compresser, remove ground cable that is in your way... dont worry you will see it. remove the 3 a/c compressor bolts. position the compresser so you can remove the manifold line, remove the manifold line. reinstall in reverse.
I take them out the top when I do them. Im not an "ac" tech per say but from time to time I help out there too and that how I do the r/i part.