Dear Rajeev,

You may not get the core branches in old IITs and but you can easily get a very good branch ay new IITs as well as IT - BHU  and ISM Dhanbad .. 

Also your BITSAT rank is very good ...you will have lot of options. check out the given links for more options ..

http://www.askiitians.com/Engineering-Exams/BITSAT/BITSAT-Cutoffs      

Click the link below link for opening and closing rank of IIT :

http://www.askiitians.com/iits-2009-2010-opening-and-closing-rank.aspx

Cutoff in new IITs  check the link give below :

http://jee.iitd.ac.in/openclose09.htm    (this link includes the more detail analysis)

for code of the cources check the councelling broucher 2009.

Please feel free to post as many doubts on our disucssion forum as you can. If you find any question difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation.

 All the best.

Regards

Vijay Luxmi