Pistons

Is there a problem using KB107 pistons on a block that has already been bored? Basically I'm just trying to bump up the compression on a freshly bored, low compression, cast piston block. But I thought I heard that the KB107s needed tighter piston to wall clearances in the machine work? Is this true? It's for a street/strip car.
If it is true about the KB's, do the Speed Pros have the same requirements with clearance?