This will not get you 1 cm, but it's something.
You will notice that the aluminum blocks are slightly narrower than the steel mounting plate, that is, there is some play. When I needed about 3/16 of an inch, I loosenned all the bolts that mount the plate to the aluminum blocks, then I tighten down the ones on the right side as far as they will go..tight- keep in mind I replaced the woefully soft blots with good quality. Only then did I snug down the bolts under the gearbox. What this does is allow the engine plate to sit as far to the left as possible given that it is wider than the aluminum plates. I still have more than 1/4" clearance from the pedal on that side.