Your 800 BB the carbs will have 1 input for fuel between the carbs. The 440 fuel pump will have 2 outputs to each individual carb. Some guys get the right pump others just splice the 2 440 outputs together with a t and run them into the 800 carbs. Sizing is a little hard because the 440 outputs are smaller then the 800 inlet. Best thing to do is make one up with a brass T-fitting and the correct size hose fittings threaded in. Hope this helps.
