Hello buddy, thanks for connecting with career360. We hope we will solve your query in the best way.                                                           

You have very good chances to get seat at NITs in good branch according to previous year cutoff.but the cutoff vary every year.           You will definitely get seat at NIT may be not in good branch if cutoff will be increase but will definitely get seat at NITs. 

You should wait for the Jee main ranks. After getting your rank , check the cutoff of various NITS and fill your counselling form accordingly.                                     

I hope this will help you. Best of luck for your future buddy!