Just a bit of advice from experience, the two bolts that connect with the servo are not the intended load bearing points. If you only use these the metal will flex and will crack, mine did on my old S7. The hole on top that's elongated is the load bearing attachment in the Sierra, you can see there is more metal here. In my 2B I created a triangle bracket bolted on the top and to the front mounting plate and also braced it back to the chassis.
I would also advise not to cut and well the pedal, it's made from very hard steel and designed to take a lot of force. Any weld would create a weak point.