When you squeeze the brake caliper together are the tabs long enough to make contact with the wheel? From the pictures it looks as if those brake arms are too short. Once you squeeze the calipers together the pads should clear the forks, they will be just to the inside. You may need to get pads that have a shallow profile. I've found that BMX brakes are plenty long enough to mate up with the wheel.Brakes - Pyramid MX Brake Set bike brake set bicycle brake set front brake rear brake | BikeWorldUSA | Bicycle Parts and Bike Accessories
As far as the dual pull lever... both brake lines will be attatched to it and the clutch will have an independent (seperate) lever.
Another option is disc brakes with an adaptor...Brakes