Hi Omkar,

It is very difficult to state definitely whether you'll get a call from the old (IIMs I,K,L) or main (IIMs A,B,C) IIMs  with your past academics records even on scoring 99+ percentile in CAT. There are reservations no doubt and you will be eligible for that, but usually for these IIMs especially IIM A,B and C, somewhat around 99 percentiles are required for non-engineers with good academic scores for non-reserved candidates.

All that said, under the CAT umbrella several other B-Schools come most of which do not see your past academics and a lot of them provide really good placements at par with IIMs. So with 99+ in CAT you'll easily be able to get calls from them.

Therefore, work hard for CAT and let fate decide what is in for you.

All the best.