Hey there!!

As per your rank and considering previous year situation you can easily get mechanical branches under first category at Chennai ,and you might even get CSE at category 3 or 4 at vellore campus.

To know more about chances of getting other courses in your preferred campus ,check out the viteee college predictor link below:

https://engineering.careers360.com/viteee-college-predictor

Hope this would help

Good luck !!