AVS 800 is a good choice, may want a little stiffer metering rod spring (orange I think?) to bring the mains in a bit quicker on a 440. i run that carb on my 427 SBF cobra and it has worked flawlessly and has much better drivability and cleaner idle than any Holley I've ever run on a mild (if 511 hp is mild ) high torque street motor.

a 4779 750DP also works really well on a mild 440 with a pink cam and a 31 shooter