You've made a common mistake. You've confused the lobe separation angle with the intake center line. The lobe separation angle, or LSA, is the distance between the peaks of the intake and exhaust lobes in degrees. It is ground into the cam and cannot be changed.....unless it's reground.
The intake center line is the method used to determine "WHERE" the camshaft is installed. Your intake center line, or ICL is 108. That means it is advanced from the LSA FOUR DEGREES.
If it was ME, I would go on down to 106 ICL. This will advance the cam a total of 6 degrees. The reason I recommend that is because of the low cylinder pressure. Those extra two degrees will help a little more.
