Probably the cheapest thing you can do to your 440 powered car that would result in all around best performance would be a smaller cfm four barrel with the electric choke you want so much. We always over carburet our street rides to our dismay.

"but will it perform significantly better than the Eddy 750"

A lot of carbs will do better than the Edelbrock 750cfm #1407 including the smaller versions like their 600cfm #1406 if it is jetted up for performance. I have used both on a mild 440 and the 600cfm gave much better throttle response with a stock converter and gears. Not to mention improved mileage. You could take the metering rods and jets out of the #1407 or any Carter AFB and swap them into the #1406 and avoid paying for the #1487 tuning kit to get the same effect. The #1406 is jetted for economy to begin with and just changing the metering rods makes a big difference. A new #1406 is available all over for less than $325.00