Given your rank, you have the slightest chance of securing a seat in IT eventually until it is the last round of counseling.
Here is a detailed analysis of the cut off followed previously by IET Lucknow for the OBC category:
Courses | Cut Off (OBC Category) |
B.Tech in Computer Science Engineering (CSE) | 357 - 495 |
B.Tech in Information Technology (IT) | 724 - 941 |
B.Tech in Electrical Engineering (EE) | 1545 - 1690 |
The only condition to this is that you have to belong in the top 5% of the branch. On the other hand, IT still is not a bad choice to go for.
With this rank, you might or might not get CSE in IET Lucknow, but you still have your options open regarding choosing from a pool of other branches.