No it isn't the same one but it is interesting. If you read between the lines its clear they didn't really have the time to dial in the other carbs at all. It appears the 650 just happened to be closest/rich, which makes sense because it is the smallest and it would be nice and fat due to the enormous signal as evidenced by the 5.5" Hg at WOT. That's way too much and the carb with the -1.7Hg would have been the victor given a little fattening up. If we extrapolate this article out and follow the zero vacuum logic then a larger and larger carb should have swung the needle the other way. We'll never know. J.Rob