C10 rear 5" or 6" lowering coil spring installed height

[kingcrunch]

Hi,

i am looking for measurements for my project vehicle.
I would need to compare installed height of 5 or 6" lowering coil springs for a C10 rear end.

I have only like 6-7" of room for a spring (installed height at ride height) and need to know if that might work out or not.

Thanks,
Alex