Can a warp shader displace a cloud layer in the y axis (the input there of

) ??
I'm trying to make smoke .... yeah I know

I've stretched a very small scale cloud "density Fractal" in the y axis to make a uniform distribution and plugged that into a warp shader. The warper is a PF at a similar small scale with various displacements (I've tried).
I keep trying different settings but get no results, any suggestions?
Ricchard