I'll make it simple, take a look around at the vets in your world, regardless of makeup. You won't find many people w/ a 30 point improvement in any skill sets from their first ST line to their last. With a 19 makeup, its going to be even tougher, not to mention the difficulty in finding/hiring a great fielding coach. The odds that both his glove and arm accurcy get to the 85 range are very, very small. Range and arm strength will get up in the 90s, provided a decent training budge.
Power will obviously be solid, but his splits, contact and eye will be too low to play regularly at 3b or in the OF. I think you're best off selling him as a "defensive" SS w/ great power to someone that believes they can develop that glove and arm to his projections. I don't think its possible, but there are others out there that will bite if you can get a decent prospect in return.