Don Dulmage from Canada milled down the divider a bit but not completely. Just 3/8" down.
Search the net for "old reliable". 11.5x at 118mph the quarter mile with a 74 Charger.

@AndyF: I am surprised the CH-28 (I am running one) makes the peak HP at higher rpm than the RPM.
Based on all the theories it should be the opposite. Is there any explanation for this?

Thanks
Dennis