To run in the mid 12's in a 2600 lb car is very difficult. If you gut it out youll be in the low 2500's. You will have to make about 230-240whp to achieve your goal. Here is what it will take
81.5mm-87mm bore- you choose
12.5:1 and above compression
High Lift camshafts
built valve train
JDM ITR tranny is perfect
440cc Injectors Max
good tuning
good clutch