If you have scored 165 in NATA and 70 in your boards then your normalized percentile is =113.5/4+74.3/2=76.25

After this you will be allotted your respective rank and you can apply for the counselling process.There are good chances that you will be getting a decent college based on your category.It might take more than 3 rounds. The cutoff will decide for admission in any institute and also seat availability and category of students in a particular institute can be a distinguishable factor.It varies from colleges to colleges.You can get more information from mentioned link.

https://engineering.careers360.com/exams/nata

Hope this information is good enough . All the best for your future ventures.