Get a snorkel and small periscope and you'll be fine.

A keeper is something you like, want to keep, and like to ride. Keep the take-off parts as you swap parts to get it dialed in to your size. If it does turn out to be a flipper and not a keeper you can always put the original parts back onto it before you send it to it's next owner. That way you'll have parts available for the next time an almost close enough fit bike comes along.