First, your notion of Black's absolutism is hyperbolic (I'd also ask you: did Black ever actually say that, or are you attributing to him Wikipedia's description of his work?). For instance, the Vinson and Warren courts didn't overturn statutes regarding fraud, which are clearly restrictions on freedom of speech.
Second, it's easy to be an "absolutist" about free speech, because the First Amendment is very clear. "Congress shall make no law abridging the freedom of speech." But read the Fourth Amendment carefully and notice that it is not written as strictly. "The right of the people to be secure in their persons, against unreasonable searches shall not be violated." What's "unreasonable"? If the framers didn't want the Supreme Court constantly grappling with that question, they'd have written the amendment differently; it's not as if it didn't occur to anyone to write "Congress shall make no law enabling searches or seizures without a warrant, and no warrant shall issue without probable cause". But they didn't write that.
Second, it's easy to be an "absolutist" about free speech, because the First Amendment is very clear. "Congress shall make no law abridging the freedom of speech." But read the Fourth Amendment carefully and notice that it is not written as strictly. "The right of the people to be secure in their persons, against unreasonable searches shall not be violated." What's "unreasonable"? If the framers didn't want the Supreme Court constantly grappling with that question, they'd have written the amendment differently; it's not as if it didn't occur to anyone to write "Congress shall make no law enabling searches or seizures without a warrant, and no warrant shall issue without probable cause". But they didn't write that.
It's 180 days, by the way, isn't it? Not 60?