Well, after reading how one poster shortened his pushrod and it improved his braking, I tried that first. I slipped a flat washer between the MC and booster and braking improved. I added a second and braking actually feels normal with brake lockup occuring on panic stops like it never did before. Not content with the flat washers, I ground the push shorter and it's done and stopping like a normal power disc brake car.
I didn't have to make a single other change though I installed the vacuum can afterwards so I still have some boost if the motor stalls. If anyone needs a brand new hi-tech vacuum pump, I'm your huckleberry as the return period is past.
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Triple Black 1971 GTO
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