I'd say the main problems that you're going to have is that this is a long stroke, narrow bore motor. If you want it to rev, you need it to breathe. To do that you need big valves, or really long duration cams, which is going to make it quite a cranky street motor. Given it's the same bore as a 5K I'd be guessing there isn't the room for big enough valves in there to make it a really revvy motor. Properly tuned ITB's will help the torque aspect of the motor, which is something I'd emphasize more than revving.