Sash7 looks like you have made your choice. The pressure is off now. The Dyno is used for more than getting the biggest numbers you can. It is a great tool to set the motor up and you dont wanting it running lean when you spend a lot of cash. Dan seems like he is a good hemi guy.

Tim Banning will assemble your motor, but Tim is great at the Hemi Head porting and fine tuning of the Heads with his CNC and his Hand finishing. I dont think you are planing much track time on the car, once in a while at the drag strip, so to pump maximum HP out of your combination is not that important, you want your motor to run nicely and last.

Good Luck with your build.