I'm pretty sure you'll need a new MC (power) to go with the booster. I believe they're different piston sizes for the different brake pressure that is required (manual vs. power).
Rev
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'66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi.
O.B.C. #2
'66 coupe
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