(2)450 DP's vs (2)750 DP's

Here's what i'm planning, I have my 71 Duster, 440 Dodge, 10.0 CR, Stealth as cast aluminum heads. 231/237 @ .050 110 lobe separation 106 ICL, Weiand 1987 Hi-Ram Tunnel Ram w/2 ProForm 750 DP, 3000 stall and 3.23 gears. I picked up a pair of Quick fuel HR 450 double pumper carbs. ( https://www.holley.com/products/discontinued_product/parts/HR-450 ) I'm going to swap them for the 750's to see the difference in performance. I'm curious if the smaller venturi's will have better low end velocity and give better low end performance. What does the FABO brain trust think?