It will make some difference, yes. Significant, depends on your definition of 'significant'.
It won't be huge, but aeromodding is all about adding up little changes. So it really comes down to your preferences/priorities.
And I'm glad I could be of help.
A few more mods: Larger OD tires (205/70R16's instead of stock 205/60R16's, front only for now), smooth wheel covers (corrugated plastic with zip ties), and running board skirts (corrugated plastic and slotted hex washer head sheet metal screws; the running boards are wonderfully plastic).
