This isn't a direct answer to your question, but I added some other options to your list that you might want to investigate, and which will probably yield a better benefit for the money. With regard to the clutch, I have indeed read of a few problems with the organic, although my suggestion regardless would be the cerametallic version. We installed one on my brother's car along with a CM flywheel, and it performs quite well (though it is a bit noisy). With the above setup, and the cam sprockets that Dave mentioned, ~180 whp should be attainable.