You will have to appear in Jee Main as it accepts its rank and it comes under JAC Delhi counseling and the registration of JAC Delhi 2018 will open in online mode tentatively in 2nd week of June 2018.

Also, to check the complete complete admission process and its previous year cut off trend you can go through the below link -

https://engineering.careers360.com/articles/jac-delhi

https://engineering.careers360.com/articles/jac-delhi-cutoff

Good Luck!!!