For 12's I can give you the minimum mod list or what worked for me. I went 12.9 @ 104 with a 1.8 60 ft
1.) You need the right gearing...at least (I had 4.10's) and short throw shifter...but you have an auto so dont know how to help you there.
2.) I had a complete 03 PI engine but you'll make more power over me with PI heads, intake and cams + Tune (I did not nave a tune)
3.) A good set of tires, use at least some Mickey Thompson ET streets or even better some slicks
4.) I had a BBK off-road X pipe, SLP LM1 catback and that was it for power mods.
5.) I used FRPP C springs...they are not drag springs and stock suspension
6.) Put the car on a diet, I started with a 248a option car (No power anything, cloth seats) I removed anything in the trunk, passenger seat, rear seats.
All of those mods with a pair of borrowed slicks in the rear, 99 cobra wheels in the front with bumped up tire preassure, disconected the front sway bar, and I launched at like 4k rpm. I t was a cool september night, no wind and a decently prepped track. I also made sure I barely had a quarter tank of gas in the car...my buddies had a few cans of gas in their truck just in case.
When that car was bone stock except for an H-pipe and flows, I ran a 14.5 flat...but again this was a 5 speed car and I can shift a little faster than my grandmom.