On mine I started with and AutoBox car and when I put the Manual pedals in, not only was the brake pedal too close to the accelerator pedal, but the clutch and brake felt too close as well. I took my auto pedal, cut it down to fit the manual pedal pad and bent the clutch pedal in a vise to move it out and give enough space for my feet. The result is as shown in the picture below




The only additional thing I want to do is put a stopper on the wheel well where the pedal arm hits so when the carpet goes in it doesn't cut up the carpet. It has plenty of travel so I'm not worried about that, but a rubber stopper will come in handy form me. There was really no way around this though, as the bend in the auto pedal put the auto pedal with manual pad about half an inch away from the clutch pedal, so I had to bend it over.