im assuming these are the right ones they are the ones i got from GM. my question is about the coolant passages. it is 5 on each side on the head and the block. only the 2 outer ones are open on the gasket with 2 little holes drilled out in the 3 middle ones. is this supposed to be like this? are they supposed to be open? i have no clue i didnt even look at my old ones when i took them off