Run the MSII with the V3 board. The CPU is faster and the V3 board gives you better flyback protection for the injector drivers. (I fried a V2.2 board because I did not run fly back protection) It also has larger fuel and timing tables for more accurate control. The stock injectors may not be able to keep up with the fuel demands of the SC.
You may want to consider this as well. Its a direct plug in to the factory harness.
http://www.diyautotune.com/catalog/m...2250d18780341e