You certainly don't need to be paying currency exchange and overseas shipping to get hold of a 2bbl Slant-6 intake manifold! They're not as easy to get as they used to be, but they're still available in America with a bit of looking.
I found a manifold on ebay. The seller isn't sure what year the manifold is from. Is there a way to find out if it's from a super six by looking at the casting numbers on the manifold? Thanks