most out of dyno tune for dd

You should put a couple hundred miles on the gears to break them in first, but that's something that's been debated forever. I personally peeled out leaving the parking lot after mine were installed, and never allowed them to break in by anything other than normal driving.
Some people recommend just getting the gears hot, then park the car to let them cool, then repeat that process a few times.

I'd just tell the dyno tuner what you just told us, but if those really are all your mods, I wouldn't bother getting a tune.. you don't really have anything to take full advantage of one.. I'd spend the money on something more productive, then get a tune later on down the road.

Just my .02