whats needed for a blow through system

http://www.msdignition.com/?utm_source=Google_Search&utm_medium=Banner&utm_campaign=Google_Search

This is what I am gonna run:
http://www.msdignition.com/Products/Ignitions/6530_-_MSD_Digital_Programmable_6AL-2.aspx

They make a less expensive less feature rich version:
http://www.msdignition.com/Products...log/6462_-_MSD_6-BTM_Boost_Timing_Master.aspx

If you already run an MSD 6 box, I believe you add a boost timing box to it.
http://www.msdignition.com/Products...Master_for_use_with_MSD_Ignition_Control.aspx