Keep the stem and bars. They look fine. Run the drops regular as standard road drops, or clip/flip them into ghetto bullhorns.

If I were doing that conversion, I would either buy a new rear wheel or a complete set, remove one chainring, and replace the chainring bolts with a single stack version. And keep the bar/stem/front brake; they all look usable.

irocycle.com has cheap and good quality wheelsets...