After doing a lot of research on carb sizing/type for my Pantera, the recommendations were all over the place with no logical pattern found.
I ended buying the Quickfuel ss-750-an. Mechanical secondaries, annular venturis/boosters and electric choke.
Since we are still enjoying winter in Michigan, I have not had a chance to drive it/tune it yet. I had trouble deciding 650 or 750 for my original 351, bored 30 over and domed pistons (per prior owner).
Hopefully the 750 isn’t too much??