Can I use B or C body manifolds fore better flow on my sleeper GTS?

You could always use one of these that were made by Accurate Exhaust a while ago. I have one for a 440 but they aren't cheap or have someone make one out of a C-body manifold...

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What was the price of that exhaust manifold? Was it sold in a set? Was the application specifically big block a body? How long ago did the make them?