This may sound stupid to some of you but, I am not sure how the dipstick tube is supposed to be properly installed. I got a new one made by Mr. Gasket and it has two notches at the end of the tube where it goes into the block. Am I supposed to just slide it into the block until the first notch hits or am I supposed to keep forcing it into the block until the second notch hits. The tube is supposed to be for a 302 but how do I know that it is accurate? Any help would be awesome. Thanks.