I would definitely take a flyer on him somewhere around picks 8-12. He's slightly shorter and much lighter than Griffin but his standing reach is actually 8'10.5'', better than Griffin's 8'9''. I'm not convinced he can convert to SF but he could be an undersized PF on the right kind of team.
Add in the fact that he hustles and is supposed to be a great teammate and I expect him to maximize whatever potential he has. Certainly worth a pick in that range, maybe even 6-7 overall. Who knows, maybe he will even grow an inch or two (he doesn't turn 19 until September, young for his class).
BTW, his FT% (46.8%!!!) definitely suggests he will not be a SF.