Thread: Head Gaskets?

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if your taking about the top holes them are steam holes that are about 7/8to 1 inch the gasket as about a 1/4 or so holes in it the front of the deck on the mark 4 block like you have all water go s to the back of the block so the gasket will be open in the back there is the bottom roll of holes in the deck that can be drilled out to 1/2 to5/8 for added cooling your block may have them or not .if you look at the photo the top roll on this race block have been closed down your block will have bigger holes so you are ok there. your block bottom row may or may not have all the 3 holes i drill them most of the time the back hole is stock and your block will look like this and your gasket will have this hole size may be different but if the holes is there it will work i have used the 1037 but i use the 1017 more