Peter,
Before you remove it, try driving it with the vacuum line disconnected.
I had a spider whose booster went out, and it required lots of pedal to stop. In fact my right
leg was sore after every drive. The difference
is very noticable.
Why do they recommend removing the booster?
I have seen guys put in their racers manual
brake bias, to adjust the amount of braking
from front to back.
Check this web site
http://www.MEV.cc/