I agree with Double D. The newer Eddie's don't have large enough passages to flow enough flow to match high air flow demands. When you have to jet down like that the carb is to small for the application.
I did some carb testing on the dyno a while back using a 11.8-1 426 wedge. I started with a 600 Eddy, I had to jet DOWN many sizes as it was Dead rich. Once I got it to 12.5-13.0 a/f and made a couple pulls you could tell the motor was struggling. Best pull with the 600 was 444hp and 386.1ftlbs. I installed a 750 Eddy and only had to drop one or two jet sizes and it made 463.8hp and 508.5 ftlbs. Going to a 850 double pumper the jetting was spot on.