depends on how much they take out, but I would say yes, ive seen somewhere that even at 5 or 6 thou you don't get piston slap, but I do know I once used old genuine bsa pistons and got the barrels bored to suit then years later let an engineer talk me into having the bores honed to get the lip out above the rings and one pot developed slap, but I ran it for a couple of summers ticking away and annoying me, when I stripped it the piston was visibly hammered and there was about 8 thou so it depends on your score depth