^the method I used for the brake & small parking brake pedals was using painters tape on top of the OE metal in order to mark where the corresponding holes lined up from the aftermarket pedals. Then make a notch on the OE metal where your mark is placed, also the painters tape will help avoid the drill bit from sliding out of place once you've made your mark. Just take your time and you'll be good. I used a 'C' clamp to hold the aftermarket pedals in place while tightening the screws/nuts.

 

I actually have same ones for a year now, had them ship from China, really like the looks.
Install was a pain, very little room for error.

 

I saw some painted with a clear and black added to make it almost like a black chrome. those were pretty nice.