TMC

I cut out the small loop that's in the passage but leave everything around the border of the opening as it comes. Even so, I doubt it will influence the way your car cools even if you just put them on the way they are.

Richter12x2

My thoughts are you'd rather have too much cooling than not enough, but it'd probably be a good idea to ask the shop you bought the heads from anyway. I'm sure they've run into it before.

fats429

Leave them just like they are . It should be like that you will see when you take the head off and look at the old gasket

Mustangkiler

thanks guys, i asked a guyi know with a race car, he told me its straight how they are as long as there is some opening.