I have 12'' qa1 110# springs in the rear. The 110's are way too soft. I am going to purchase 130's or 150's in a 14'' length and trim to fit. the 12'' will set the car right on the ground! I run a 4'' backspace 8'' rim with a 275 60 et street radial and I have an 1/8th inch clearence on each side. It is as about dead nuts as you can get. Most people that see the car ask if the wheel wells have been cut out or modified. I have the wheel lip rolled very tight. The springs also provide more room for big exhaust. And you will have springs if you ever want to go to a coilover setup. I will try to post a pic of the back of the car.