RE: what would it take to electrify an uproar from tower hobbies
The Uproar has an open frame firewall that would be a great fit for a direct drive outrunner like an AXI 4120/14 motor from [link=http://www.hobby-lobby.com/brushless_axi.htm]Hobby Lobby[/link].
Take a look at my Skylark conversion thread on this forum. You could use a similar power setup and perhaps only need 14 cells with a 14x7 or 15x7 APC e-prop.
Good luck!