Disc Brake Conversion on A100

Are my eyes deceiving me? Are you mounting one brake to to front and one to rear? Probably not a good idea on the front axle.
The Dodge A100 has all four corners on leaf springs.....may be why you appear to be confused with my pictures. Drum brakes on an 8-3/4" rear end similar to cars.....only big difference is the spring perches are underneath on the trucks.