Well, my only response to that line of reasoning is this.......

You might be able to get 700hp out of a 470 easier and cheaper than you can from a 511....... but I can’t.

When you dyno tested that 511....... on the same dyno you tested the 408 on....... how much less did it make?

If you changed the rotating assy from the current 511 to a 470...... and changed nothing else....... how much more power would it make?
For less $$$ than the $1675 it would cost to send your intake to Wilson, you could sell your 511 rotating assy and replace it with a 470 rotating assy.