I have a 68GS400 Automatic non-air car. It's all stock except I converted to 15" Rims over the stock 14". Its in dire need of some new rear coil springs. My plan is to also replace the gas shocks at the same time. I keep getting mixed suggestions on which coil springs to use which has slowed the process. Mainly because I just can't seem to make up my mind on the direction of the car..... So I thought I'd pool the masses for opinions. I've been told to use Moog 5409 or 5385. I've checked into other brands but I'm pretty sure I'm going to stick with Moog. Unless someone can convince me otherwise? I thought about ordering some lowering springs from Detroit Spring and dropping the car a few inches but I think I've decided to stay with the stock height in the rear (for now) and maybe drop the front 1" if I do not like the look. The car is used mainly for cruising so ride and handling are important. I'm interested to hear which springs and shocks you'd suggest and why?
I also had a local parts store tell me it should be Moog 5379. So I'm curious who's running which Moog spring, why and how they like it?
I'm running moog #6321 with KYB shocks and UMI uppers, lowers and sway bar. I am very pleased with the stance and the car handles great. Added air bags couple of weeks ago for spring support for when there are passengers in the back. Tony
Thanks for the reply Tony. I do like the looks of your car so I may just go the 6321 route. Heres what I've noticed by reviewing the springs at Moog. 6321 is a 8.5" installed height. 14.28 free With a 689 load and 0.531 dia 5379 is a 8.5" installed 14.75 free with a 760 load and 0.562 dia 5409 is 7.5 " installed 13.44 free with a 847 load and 0.544 dia 5385 is 9" installed 12.6 free with a 607 load and 0.562 dia I'm curious what would be the advantage or disadvantages of each spring.
