pedal box should be just that. A box at the end of pedals housing the cylinders.

Not a box located the opposite side of engine bay linked by a bulkhead bracket bars and bodged jobs.

The problem with the mk3/4 is that they were designed the proper way round LHD. When converted to lame hand drive it got messed up with linkage bars. Hence brakes always have issues if not sorted right.

There will be a right up I done in fastford mag soon that will be a good read for you.