Looking for stiffer coil springs.

[crispyknite]

I'm looking for a set of coil springs for my 1995 formula Z that I put a ETS upgrade kit in and I need a stiffer coil sping.
It's has to be HEAVY DUTY
11" in length
0.331 of more rod diameter
1.75 inside diameter
#220
Can be New or Used, any help be great
Any make or model
I took a Pic of the Rear suspension so you know what I'm looking for.

Thanks Tim

 

[mjkaliszak]

I did buy some heavier springs from " Goodwin Performance " a few years ago for my XP. Not sure they will have springs for that year but worth asking. A spring heavier than 220 #'s might be tough to come by. JIMO