I'm not claiming these tracks are heavily Afro-Cuban. But they do use one of the
clave rhythms:
1 e & a 2 e & a 3 e & a 4 e & a
X . . X . . X . . . X . X . . .
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(You might want to ignore the visuals on that one; it was the best sounding rip on YouTube. [EDIT: And now it's no longer on YouTube so I substituted a video of an lp cover.])
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I presume this rhythm enters hard rock by way of Bo Diddley; a precursor to "1969" is the instrumental break to the Byrds' "Tribal Gathering" (at
0:50 and
1:30):
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