I'm not very interested in Blaxploitation either, but a more general 1970's cops-and-robbers theme, on the other hand...
Especially, I'd love to imitate the ambience in "Life on Mars"*, which I'm honestly starting to think of as the best TV show, ever.
I think someone was even working on modifying .45A to a 1970's setting, which were the same lines I was thinking along.
*For anyone reading this years from now, I'd like to point out that as I write this, there's only the British version of the show. Apparently the Americans are now remaking it, which I'm not overly hopeful about.