OK. In a motor vehicle: forward, rearward, left and right are almost universally referenced from the driver's position.
Put yourself in the seat, and it's all relative to you. If you have the hood open and you're looking at the engine from in front of the vehicle, the left side of the engine is on your right (driver's side, in a left-hand drive vehicle). Again, relative to the driver's position. This lets all vehicle techs communicate positions and directions easily and minus confusion.
Enough on that.
Today I spent some time with my head in the footwell area watching the action while I moved the pedal assembly with the switch. I moved it from stop to stop a number of times, watching and listening. As the pedal mechanism came rearward (closer to the driver), I could see more of the wormgear shaft that was hidden from view by the accelerator pedal assembly.
The spacer will only limit rearward pedal travel. If you need the pedals all the way forward (away from you), there will be no change to that position. If you need to bring the pedals closer to you, there will be about 3/8 inch to 1/2inch reduced travel to the rearward direction stop, caused by installation of the spacer. The spacer dimensions are not given, but the wormgear shaft looks to be about 3/8" diameter and the spacer height is about the same as the wormgear shaft diameter. You can see this in the pdf below.
The bolted-in stop block that is part of the recall is to ensure the brake pedal will not become detached from its mounting in the event the spacer doesn't prevent the failure of that "plastic travel nut susceptible to failure," as it was described in the recall pdf.
Anyway, hope this clears up a few things.
Safety recall V07 attached for your viewing pleasure, in case it hasn't been posted yet.
Steve