I need to know which is stiffer; WS6 or Z28 springs? I am going to remove the lowering springs and put new factory springs in my car. I need to know which car to order them for. Should I order them for my WS6 Formula? Is there anything better? I have been looking for part numbers but, I haven't found anything conclusive. I want a name brand factory replacement.

 

moog 5662 should be the WS6/Z28 front springs.
moog 5664 is a bit stiffer, if that's what you're going for.

Moog 5660 is a bit softer, which you're probably not going for, but anyway...

For rears you have moog 5665 linear springs or cc635 cargo coils.

 

Which of these fronts will give me a factory ride height? The cargo springs will probably lift the rear so I don't want those. Are these the one you are using?

 

i'm using 5664 and cc635's. My rear end is jacked up due to 29" tall rear tires, and I like the raked stance, this is a muscle car after all.

These are all stock springs for 3rd gens, the 5660s for the earlier V6 models I think, base models, etc, 5662 is the aggressive IROC style, 5664 is for convertibles (stiffest rate).

They should all give basically the same ride height.

 

I replaced the stock front springs on my Formula with Moog5662 and the front ride height remained the same as before the swap.

 

I am going to put new springs in next month. I like the lowered look but, there are too many holes and speed bumps around here. I think I am going with the 5662s and the 5665s. Do you have any pics of your car with the springs?

 

I am putting my new springs in tomorrow(5662s/5665s). I hope it yields the ground clearance I am seeking for my full length headers.