Jack,
I didn't think it was good to use a 4V intake with 2V heads because while it may work to use a manifold with smaller runners than the ports, the opposite is not true. I know some 4V manifolds are intentionally designed with undersize runners, but not the opposite. The Torker, for example, has a miss match designed into the manifold (smaller runner), and buyers are told not to port match the manifold.
I also think that the Weiand single plane 2V manifold is the most popular manifold for 2V heads.
Ken
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