It should work, from the top it will look like the stock A Body manifold , the head pipe connection though does not line up with the stock head pipe , for that you will have to have a pipe creatively bent and welded up.

Cudaman1969 brings up a good point, what engine are you using??? 440 ignore what I posted as the engine is wider, I test fit the drivers side C body manifold on a 383.

If you angle cut the C body manifold even on a 383 that would help a little with the bend that is needed on the outlet flange.