im having a case of the newbie blues. im putting a set of 915 heads on a 400 block. all was going well until i got to the intake. my gaskets dont fit properly. i think its leaving the heat cross over open? do i need a special intake with these heads. both the 400 intake and a 440 intake fit fine with the exception of this hole being wide open. what do i need to do to solve this problem?

5440219-intake.jpg (70 downloads)
71 scamp big block with 915 heads 727 trans