I see you haven't put the frets in yet. I would just level the board with a leveling block.
I have thought about that, but I have some rather nice block inlays in there. The fretboard is probably thick enough, but I am not looking forward to sanding through, and replacing inlays. I am considering taking it apart, and salvaging the fretboard and truss rod, but making a new neck blank and starting fresh.
What is your relief on the neek. Have you measured it.