When you buy eddy carbs that are smaller than rated and stick them on a 528 or bigger Hemi with real heads, there is no need to restrict it further by using a progressive linkage. Its not a wedge motor, and it will want fuel with the air it takes in.....

I have a 1250 dominator on my Hemi, and restricting the opening on the secondaries with the adjustable linkage on the G3 Dominator is like turning it into a two barrel performance wise. I put it back up to nearly 1:1 and I can change lanes with the gas peddle at 50mph! Its a night and day difference....