I have a 64 sport fury with a 440 +.030 3k stall 727that uses a 750 race demon. We ran it with several carbs, and my friends 650 holley gave the best 60 ft. We tried an 850 and an 800 both were much slower. All were double pumpers. final e.t. was 12.12@110mph. When I started it was running 13s. All gains were with carb and tuning. What I am saying is you need a smaller carb to help the 60 ft.Try different timing, and we still need to know if your 60 ft was from bogging or spinning. Hard to give a recommendation without that.
