Years ago, I had a 69 GTX. The 440 was stock. When the factory carb. went bad, I had it replaced with the Edelbrock Torquer and a 780 Holley. That was the best performance money I ever spent on that car. It really came alive with that combination.
I don't understand why so many of you are still having problems with ethanol gasoline. When racing season is over, around the end of November, I park my car and add a can of Stabil to it. After that I usually start the car about once a month and let it run for a few minutes. The 750 D.P. has been on the car for over 16 years now, and never any problems. In my mowers and weedeater, I do use non ethanol gas for them.