Booster is different dual diaphragm 79-80 took a iron MC, 81 a larger register quick take up aluminum MC as the calipers are "low drag". It gives more assist -why you need a lower ratio pedal.
Pedal ratio is different but you can redrill a standard one like the picture. If you don't it will still stop good,but using your little toe for pressure!
Don't worry about a prop valve -T the fronts and add an adjustable in the rear line. That way you can fine tune for different spring rates, shock rates and tires comapred to the factory set one.
Be sure the rear calipers are actually ratcheting with the lever E brake. They often lock up and do not causing poor brake response(too much gap pads to rotor). If you need new ones think about some rebuilt "lifetime warranty" as somewhere they may freeze up. I personally think silicone fluid helps prevent that and I have it in both mine and have no poor pedal feel even on hard braking as some folks say silicone does.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
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