I have one on my 427" SBF Stroker in my Cobra replica and after some minor tuning of the rods and springs it works better ON THIS CAR than any holley.

I have a fair amount of experience tuning the old 68-71 440 AVS's and the cobra really needed a tractable roll-on to the secondaries, the double pumper worked awesome but when you roll on the power in a curve just slightly too hard on street tires a Cobra can try to swap ends on you. The Thunder AVS works just right for this combo, the only other thing the Edelbrock needed was to convert it to a dual line feed because without it you rely on the flow passing through the body to keep both sides/bowls filled. AT WOT in a light car the single feed wasn't keeping up and would go lean under hard acceleration. The dual line feed did the trick.

On the track I can run race tires and use a DP more effectively, but honestly I've got the AVS so well-tuned now I don't really worry about it.