One more addition to my post above.
The 515 Big Chevy posted here:
http://forums.maxperformanceinc.com/....php?p=4704122
makes 2000 Horsepower race tune, 1000 Horsepower street de-tune.
I see a few parallels beginning with engine size and power goal to Ed's.
The Cam in the Chevy was
252 intake dur @ .50
256 exhaust dur @ .050
.715 lift with 115 LSA
The Cylinder Head was Brodix Big Duke PB1802 - intake port 456cc
flowbench numbers attached image