His problem is the alignment of the hole pre-cut in the pedal box for the accelerator pivot and it's alignment with the hole in the chassis for the other end of the pivot.
Mine looks very similar:
From the top the alignment looks OK. From the front you can see that the hole is 3mm-5mm too high
As none of these panels are fixed yet, below are some shots of the positioning of the pedal box so you can see how I have positioned it against the other chassis components.
Looking from the front I also have a concern about the positioning of the clutch cable aperture in respect to the cable mounting bracket. The pedal box hole looks too far right.