The average 408...

You can gain 9 HP by going to a bigger carb.

To me it seems like a "combo" thing Justin. MDs cam is a little bigger, but his exhaust flow is much better, he's running a split pattern,

Hey!! Maybe D2000 knows its a Mopar!!

But seriously - Im not sure how you can expect D2000 to know if you're running an SP2P or an Air Gap! , it just sees a DP intake and croaks it!!

Intake and headers is where Id go next, stop diddling around with the heads and the cam. You've got as truckload of torque anyhow!