I see that you are planning a custom tune.

There are some shops that offer free re-tunes.

That way you can do the intake, then tune (or vice versa), and then a pulley and re-tune.

Also, check what NW is charging to upgrade from the single to the dual intake, and offer a better deal.
Lots of us bought the single intake.

BTW - you should come to the Tail of the Dragon GTG Halloween weekend in Fontana Village, NC so we can compare differences.