Brake diaphragm failure in my 57?

[Highsider]

After replacing my master cylinder and 7.5” booster this past fall, only 140 miles ago, I have a dead brake pedal. At first, I could make my passenger fly out of his seat when I tapped the pedal. The brakes were nice and powerful. Now, they are like decent manual brakes.
I found this explanation and potential cure on the NAPA site. You guys have any input?


Yes, the Edelbrock carb may be causing a rich fuel condition and no, I don’t have a charcoal filter inline.