Hi
Congratulations on your performance. Well, for suggesting the best colleges in regard with your rank in WBJEE ,  you didn't mention your category and whether you are belonging to West Bengal as the home state quota shall be applied.  I am listing down in reference with general merit and home state quota. Getting mechanical engineering on this rank seems difficult in Jadavpur university, however, you might get admissions in

• civil engineering,
• metallurgical engineering,
• production engineering,
• power engineering,
• construction engineering,
• printing engineering
• food technology and biochemical engineering

Hope this helps!!!