Your trying to install expensive wood flooring onto concrete...hmmm.
If you want it to last, you need a subfloor to "nail" it to. True wood will not float, it will only cup and warp. And never glue it to concrete. However you do it is up to you. 2x4 PT nailed to the concrete over a plastic barrier will work the best. Then shim the 2x's where you need to.
Remember to start at the highest point and level from there.
Hope you can make em fit, otherwise, I personally would not waste my time with wood.
Good luck man.