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I don't think Mopar ever made a B version of the Stage VI intake. Only ones I've ever seen in the catalog were for RB engines with Stage VI heads. Zippy would know for sure.

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Isn't the "B-version" on a B-block just an RB intake dimensionally due to the raised runners?

I just got one of the RB specific intakes a few weeks ago. ALL of the internet websites that offer one new (like Summit Raacing) show ZERO stock and the site that I ordered one from does the "direct-shipping from manufacturer". They called me the first business day and informed me that they are no longer available. So I found mine on craigslist.

There's no way that intake will fit a B-block even with standard heads. I will mock it up this morning for fun but those ports on the intake are much further apart. And the top rail of the block mating surface is wider.

And of course,as cast, the intake ports are smallish, like Pontiac ports, but I suspect they're that way to let the builder open them up as they like.