I have always found a 950 HP type carb to be better on a smallblock anything.
I finally bought an 850 several years ago for my current combo( because it was black and red)
.dumb.. and sold it and bought a 950. Car is much happier with the 950. I suspect the smaller Venturi size of the 950 makes it crisper on a smallblock. But I am not a carb guru. They have always worked extremely well