I would not have it kiln dried .
Air dried walnut is a joy to work with Handtools + kiln dried might loose some of the colors.
Walnut is a very stable wood second only to Genuine mahogany. It will need time I would give years as many as possible the more the better.
I haven’t had any claro in my shop for a while now. When I did it was the best wood a guy could hope for.
Truth be told I’m fairly allergic to walnut now and too poor to afford it.
Good Luck