At 55769 OBC rank it is very difficult to get iiest shibpur as the cutoff to get iiest shibpur according to the latest cutoff trends is about 42000 so according to that it is very tough to get any seat at iiest shibpur but yes you can apply for csab counselling and see if you can just get into it if you are lucky enough also you can predict other colleges which you can  get by using this link

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer