Wheel Spacer Question

Hey guys
I just had a quick question about wheel spacers because I'm too lazy to figure it out myself lol.

So..
I'm thinking about getting wheel spacers
I want to get the bolt on hub centric type like these ones

http://www.protuninglab.com/ic-v2420...tm_content=pla

My question is
Will the current wheel studs sit flush with the holes? If they don't, what will I have to do? Grind down the studs until they sit flush?

Thanks guys