Mopar 340 intake gasket replacement

None2Slow said
Take the dowels out. When you tighten the intake down, you could crack the intake (don't ask how I know). Don't worry about the exhaust crossover, although it may cause the intake to discolor in that area. I'm not sure if you can or if it makes a difference, but the gasket sets usually comes with a block off for that area, just not sure if you can use them on an aftermarket intake.

I ended up ordering two different gaskets. One with the hole for the cross over and one without. The one without does not have the cut out for the u-shape hole. Which should I use? And what are the four round pieces in the picture with the gasket with the hole?