I'm having a 406" B engine built with ported RPM heads and a Offy tunnel ram. The long block is the one Brian @ IMM built for the budget hemi power build. He's doing the heads and using 1.6 PRW rockers. The carbs are #4966S AVS carbs that I have used the jets and rods that are speced for the 500 cfm dual quad carbs. It will be getting dynoed so it will be interesting to see how the jetting plays out. It should be on the pump late August- those guys are really busy right now.