What should i change to get into high 11's?

He has a torque converter that gives him 32-3500rpm flash stall and he has 3.73's on a 26 inch tire. I do have an extra 3.91 pumpkin but it has to be gone through (bearings are a little noisy and its an open diff). My mph was 105. ( this was also my first time ever at a track and I was on street tires not DR's).
I know keeping up with the jones's is not going to work but he is my older brother and I simply can't let him beat me or at least not make it easy for him to beat me haha. Outside of drag shocks and subframe connectors is there anything else I could do to the suspension for a SS spring car?