Out of my wheelhouse, but since they were designed for B bodies, I would assume so- maybe with some exceptions like power steering or power brakes. A search over at FBBO or FCBO should answer that question.
Edit: Or are you asking if B and C body manifolds fit A bodies? That answer is yes, but with some caveats- not a straight bolt-in (at least on the driver's side). i.e. steering column/sleeve interference that needs to be worked around.
[URL][URL]https://web.archive.org/w...://www.bigblockdart.com/techpages/HPman.shtml[/URL][/URL]
