They are stuck with those carbs as they have no choice. Given the option between what the rule book says is legal and what ever carb their heart desires, I guarantee most if not all would be running something else. Likely a Holley.
No, they had no problem using a Quadra-Jet, or a Thermo-Quad. Like everything they did, it was meticulously thought out and executed. They did not care what the latest thing was, just what flat out worked. They opened my eyes wide. Another friend , with a 396, 4 speed Chevelle had to have an 850 Holley. The thing was so slow, I asked if he had the original QJ. I spent a day modding it and setting it up for him. Next track day, the QJ made so much more bottom power it ripped the lining off the clutch disc on the first pass. But, he put the "race car" Holley back on and kept going slow. That QJ is probably still sitting on a shelf in his garage. Just one example. 98% of people don't need a Holley and all the associated tuning, in fact they would be better off fixing or tuning what they have.
