The pedal bracket for the DBW fits the firewall with a little modification. The real difference is the pedal location after you mount the bracket. I had to cut and reweld my pedal so it would be in the same place. Some pedal bracket assemblies are all plastic, I am not sure what came in a '03. I would not attempt to guess with matching the TAC and Pedal assemblies. They need to match or the computer won't be able to operate the throttle.

Z-Rod