Jeep ZJ rear coils? Or only TJ coils?

[Low & Slow]

I've been searching for exactly what kind of rear Jeep coils will work to lower the rear about 4". Ran across a post referring to Jeep ZJ rear coils but thats it. Just one single reference to them.

Is anyone actually running them? There are plenty ZJ's in my local junkyard and zero TJs so if this is a confirmed method I can grab a set this week. The ZJ is the V8 chero so I'm having a hard time believing that the V8 springs would lower the rear. Wouldn't they be beefier?

Any input would be great : )