You don't want to advance the stock camshaft, you need to retard it. I've run mine a tooth retarded but it is just a bit too much for a short track. I'm going to have some gears machined for a new keyway that will retard the cam slightly, you can change the characteristics of the cam with valve setting slightly as well. Don't worry about the compression, its just the static compression your playing with your not going to increase the compression ratio, valve events are more important.