Greetings,

Sastra rank is published based on the aggregate of JEE MAINS and CBSE board exam.

Yes , there are chances that you will make it to sastra kumbakonam main campus but you need to score well in JEE as well to get a seat in CSE. The competition in CSE is really high but a good score might increase your chances to get you into the course you desire.

Good luck!