Well I have already 1.5 inch FRPP springs, 302 intake and 3.73 gears. Looking for suspension parts to put it on rails. End goal is a naturally aspirated 550 rwhp car. Backstory is a 2014 Cali special that was fully loaded. 34k miles and all the track apps that the track pack cars have. Amazing find for 25k. Anything you can offer honestly.
You need to change out the lower control arms and upgrade the bushings; rear end is junk with the stock parts.
Upper control arm: BMR with polyurethane bushings is an excellent choice.
Lower control arm: Steeda Billet Rear Lower Control Arms - Polyurethane Bushings