The Edelbrock carb has problems fitting on a Ford product. Your stock air cleaner won’t fit, and the fuel line is on the wrong side of the carburetor. You will also notice the car is slower after installing the Edelbrock 600 CFM, because Edelbrock carbs do not flow as much air as a similarly rated Holley.
If I were going to use an Edelbrock carburetor on a 351 I would get the 750CFM rated version. It is about equivalent to a 650CFM Holley in performance, and is perfect for a 351.
That being said I would never buy another Edelbrock carburetor since from my experience they offer no advantage over a Holley.