i'd say you should get new wheels. slap those on, there may be some issues to work out, but you should be okay with the equipment on there. until you feel the need to upgrade, as i'm sure you will.

otherwise, it shouldn't be hard to convert, i'm just unsure about those SA 3-speed hubs. besides, suicide hubs are sketchy. i'd reserve them for ultra beaters/polo bikes or temporary fixes.