not to be impartial...but good choice with the HI-6S... I think you'll like it. I'm still waiting on my money from BMW for saying how nice their car is
You can open your spark a little, with the box. a good rule of thumb would be not to open it to .045 from .040, but to open it about .004-.005. (i.e. if your running .038, go to .043, .039 to .044, etc.
of course others may disagree.
A tip you can do, if you're running single electrode plugs (not bosch +4's or splitfires, cut the electrode back to where its tip is halfway over the bottom. the take a file and round it off. Autolite has a plug like this already i believe, but this will help for a more powerful spark.
Are you going to go with the DynaMod or not right yet?