Going to remove the 7 1/4 rear and replace it with a 8 3/4. I know that I need to move the spring pads over a bit. I need a leaf springs that I can use. This car will run V/SA with the Super Six. Not much done to the motor but a 4.86 gear, reverse body trans and a race converter and a 9" slick. Can I get some HD 360 RR springs to fit?