Help me win this argument 400 in a 72.

Stolen from a moparts thread about a 400
mopartsforum said
This is my sons street car Dart. It has a stock stroke 400 with .030 over KB pistons and stock rods. Comes out to 406 cubes. He uses 10.6 comp with Eddy RPM heads and the MP .557 cam. RPM intake with 750 DP. With 3.91's at 3550 race weight he has run 11.40's @ 117 driving to the track. Ron