When I got my chassis dyno setup, I played with 3 carbs on my old 4x4 with a moderate build 440. The thermoquad made quite a bit more power than the 2 edelbrocks on a performer intake. The bowl eventually cracked and I had to run the edelbrock 750, it never made the same steam. I think this is part of the issue on my dog of a ramcharger current project, is the edelbrock carb just doesn't breathe deep enough, or the performer intake and edelbrock carb combo just doesn't work that well together.