I have the tall olds script covers in my 65 cutlass
www.google.de/search?q=oldsmobile+tall+script+valve+covers&dcr=0 &source=lnms&tbm=isch&sa=X&ved=0ahUKEwiN97DNk5PXAh VJNhoKHeEXC_04ChD8BQgKKAE&biw=1366&bih=587#imgrc=_

Notice still with a 8" brake booster- no way to bolt this covers on because they hit the booster, are these covers require only a master cylinder or?

 

These covers are intended to clear roller rocker valvetrains on serious race cars, so no, they were not designed to accommodate luxury options like power brakes or A/C. Either get used to manual brakes or try to adapt a hydroboost.

 

can you become the same brake feel with a manual brakes as with the powerbrakes ( single 9" booster) ?