340 six pak setup

On my 6 pack the center carb was 4792 and end ones are same as yours. The specs are center carb 350 cfm and each end carb is 350 cfm. I think the 440-6 had a 500 cfm for center. I had to get new bowl for one of mine and Allstate Carbs had new bowl with correct numbers. They have all parts and are priced fairly and can rebuild carb completely. Web site is WELCOME TO ALLSTATE CARBURETOR & FUEL INJECTION