If you get a score of 655 in NEET and you belong to OBC category, then you are at a better place. There are good chances to get KGMU Lucknow. If we talk about the All India Quota, then OBC AIQ rank for MBBS 2024 was approximately 5268 with 640 marks for OBC category. With the marks of 655 your rank will likely be under 4000, So you are well within the range. You can secure the seat in the 2 or 3 round. If we talk about UP state quota Closing rank in 2024 was approximately 3665.If your All India Rank is better than approximately 3,500 (quite possible with 665 marks), you'd likely fall within the cutoff in round 2 or 3 . So All India Quota Very promising with 665 marks, you’re likely to bag a seat in Round 2 or 3. State Quota also favorable strong chance in Round 2 or 3 if your state rank outperforms approximately 3,800.