Weird carbs on ebag...
Those things are like the predator carb that came out in the late 70's early 80's. The predator carb bragged about the same features. I ran Stage 1 Buick's at the time and took off my 800 Holley and tried a predator carb because it was about 1,000 cfm. In a word it sucked, my ET's were about the same but lost about 5 mph thru the lights. They brag about not needed a choke and I will tell you they are a bear to start in cold weather without a choke and accelerator pump. I switched back to my Holley and was much happier.
Chuck