To secure a SC rank around 1000 in JEE Advanced, you typically need around 60-70 marks, depending on the difficulty level of the exam and cutoff trends. With this rank, you may be eligible for some older IITs or new IITs for branches like Civil, Chemical, or Metallurgical Engineering. You could also consider NITs or IIITs for branches like Computer Science or Electronics, though getting top branches in IITs may be challenging with this rank.

For more details you can visit the link given below

https://engineering.careers360.com/jee-advanced-rank-predictor