Depends on the year of the block. Magnum blocks are a different off set. They can be identified by having 6 holes instead of 4.Early are 4 holes and take a inner and outer or they make a gasket that is connected like a wagon wheel. You can see on the pictures below they inner and outer are the same height. Be sure to have the holes milled to the larger diameter as seen below for a high volumn pump and use a Wix filter or NAPA gold. Many oil seeps are caused at the outer gasket by not doing this when twisting these motors up with thick oil. Just something we do.
And don't leave rags under the intake like the last guy that came here.
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