You could go with eight straight carburetor pipes like these, although it's a little more hot-rod than muscle car.
Or bent . . .
http://farm2.static.flickr.com/1179/...d361dd.jpg?v=0
You could also go for the Shaker that was on the Hemi Cuda. Here's a pic of a 1/6 scale model that you can find online for ~$30. I'm not sure what the original shaker dimensions are, but if 1/6th of that is skinnier than the top of the case, then it will fit with little modification (I love the HemiCuda, and thought of doing a mod like this using this idea. I got the inspiration from your superbee) I should add that you would probably have to put 426 on the side instead of 440 since the Shaker was featured on the 426 only I believe.
Edit: I stand corrected. This is from a rendering of the Chrysler turbine car if it had made it to production.