Manifolds/Headers for Early A-Body

I will be putting a 360 with a 727 floor shift in a '66 Signet. The car is manual steering. I don't want to cut the fenderwells. I currently have a set of 273 manifolds from a '64 Dart. I'd really like to open the flow up a bit. I'm looking to see what I might have in the way of options...

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