No way
'Kung fu style' includes over 60 different styles of Chinese MA. Im sure that over the years they have managed to come up with a way or two to evade, parry, or block a punch. Some of the styles have very different looks and strategies so you gotta try out a few defensive styles to see if you like it or not. Some of the defensive techniques might not work too well with the double hand shields or boxing rules. One has to realize that techniques and strategies tend to be built around the equipment and rules used when it becomes a form of sport or competition. There are probably stuff that can translate and probably stuff that dont. Experiment.
simply put no
very different sports
NO NOT DEFENSE BUT MAYBE DISCIPLINE AND TIMING,OTHER THAN THAT SORRY WHOLE DIFFERENT SPORT.
Adopting a kung fu style defence, used in kung fu, can it help in a boxers abilty to be a good fighter?