and from your second link for those who think Quadrajets don't have what it takes this shows they can be tweaked if you take time to educate yourself...
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Tip 4: Carb Contemplation
Patrick’s Bird had to run a Q-jet, but for 2004 it flowed 800 cfm instead of 750 and is internally modified. Aside from jets and metering rods, Patrick says, “The needle-and-seat is the large one, and I adjusted pressure on the electric fuel pump until it flooded and backed it off a half turn. Now it’s set to 7 pounds–everyone says the carb should flood, but it doesn’t.” The carb shown is from Cliff’s Q-Jets, which is even more trick for the ’05 season."