Without the booster the stock brake master cylinder gives an extremely hard pedal. You almost have to standon them in a panic situation. I know, my Tiger was like that for 25 years.

Find a Series II Alpine brake master cylinder and swap it for the stock one. The brakes are not soft with this set-up but the pedal will travel much further than the stock set-up even with the booster.

Then you can leave the booster in the car, bypass it with a connector to mate the booster in and out lines. I did this and the brakes are great. Takes some getting used to the softer pedal, though.

Fred Baum