How happily you seem to leave out that I stated a goal in the 1st post - 450 - 500 HP street/pump gas motor. So, doesn't matter if the 440 is going in a bus, airplane, boat, crane, or Duster, which is the best of the 3 heads listed for quality, and performance. Asking those that have experienced one or all three of the listed heads (which you obviously haven't but commenting for all the off topic - turn the thread sideways, and muddy water comments LOL).
