I would just get one of these. MSD made them smaller than before.
http://www.amazon.com/MSD-Ignition-6425-...13859749&sr=8-3

These work great also.
http://www.msdignition.com/Products/RPM/...ng_Control.aspx


You can advance your timing when trying to get max MPG.
Great for when you run nitrous & you would need to retard your base timing.
It worked great for me.

MBHD

12 port SDS EFI