I'm going to be buying a crate motor here in the next few months and it comes with non efi valve covers. I'm going to keep the efi set up, with that said I know that I more than likely have to get a spacer for the upper intake. Now with these covers I has a hole cut out on both covers. If I use these covers with the efi is all I will have to do about the holes is just get breathers for them? Or would it be better to just get some efi covers?