400 with 440 crank

Building a low deck stroker with a 440 crank, and using 440 length rods completely defeats the purpose of building such a beast...just keep it simple and use the 440 block.
That combination using a B length rod is a whole different story.
By shortening up the ratio and increasing angularity, you're talking about a combination that literally pukes instant torque.

Yeah but it fits better than a 440.