Love the Tunnel Ports.....
Last 3 I've done made 580 hp, 696 hp, and 722 hp....
I still think there has been a break in communication somewhere. I know that Eric has a chassis dyno there, and to me, there would be little reason to pull (20) Roush 427R's out of the crate and put them on an engine dyno before installing them into Cobras.
My gut tells me that the info that has been provided above has all been chassis dyno stuff, which opens a whole other can of worms, and a whole other can of variables.
Would like to see the dyno sheet.