Cronbach's alpha

Dear sir,
I want to use the EAT-26 in my study , and the zero frequency is high in scoring because more than one answer represent zero in scoring ( never=0,rarely=0,sometimes=0) , so Cronbach's alpha is low ?! but if I insert the data as, never represent=6 , rarely=5, sometimes=4,usually=3, often=2, always=1 then Cronbach's alpha will increase !!
can I do that only to calculate Cronbach's alpha ?! I mean changing the scoring only for the pilot study?!
Best,,