I want to do the same as you but without touching the motor. I'm going with some suspension work, slicks w/skinnies up front, and a tune. I hope to be in the mid 12s with those mods.
2013 1SS LS3/Cold Air Inductions/VMAX ported tb/TSP 1 7/8 LTs and xpipe/factory NPP axleback/BTR stg 3 cam kit/ZL1 injectors/3.91 gears/MGW sts/DSS carbon fiber driveshaft/DSS 1000hp axles/BMR LCAs & adj. toe rods/DSMLIGHTS E85 dyno tune 454/427 running out fuel. ZL1 fuel pump, McLeod twin disk, and retune coming soon