From the numbers posted above, if the header was made for a b16b it will be perfectly fine, the b16a will be pushing it. If you can fabricate basic crap, you could make a spacer between the two halves of the header and run 2 gaskets with extended bolts.. Wouldn't be hard at all with standard tools and some scrap metal.
Or you could just buy the right one.. Get a header for an Integra type R.. Same thing.