#1037 fel-pro head gaskets for gen IV block and heads

Hi , I'm new here. My question is, Fel-Pro told me to order the #1037 head gasket. My short block is already assembled and I do not have the lower cooling holes between the cylinders. I know Fel-Pro says to never modify their gaskets, but can't I just add one hole to the of each gasket. And if that is correct should I match the hole, or punch it to a certain size. Thanks for any light you can shed on this matter. P.S. It's for a drag race motor.