Just curious ... why did you choose the 1900 over the 2300?
Personally I like to start with the bigger blower and a larger pulley so I can step up more easily later on. When I sell a Pro-Charger, I always try to put the customer into a D1 vs the P1 because I know what an adictive habbit this HP stuff is and its easier to turn a D1 up later on and meet the ever growing expectations.
LSA is such an important factor in camshaft selection. While an N/A cam will work for an SC application, the SC will work so much more efficiently when used with the correct cam
I know Mast is not new to this arena, and they have made many proven combinations. Was the cam you used intended for a boosted application or N/A? I have no affiliation with them, just curious.