He's looking for a dual plane intake. The SD & M1 are single plane manifolds.
To the OP, you may be in for a real search. I don't think they make a dual plane for the W2s because they're intended for higher RPM use & dp manifolds really aren't.
Yes I know he is looking for a DUAL PLANE, I can read, I was just offering some options for a STREET manifold, and possibly a single plane, just in case he could not locate what he is looking for. And yes, they did make dual plane W2 intakes, Mopar has one.