using nearly full length higher rate springs w/ NB upper shock mounts for lowering

Hi all - I am considering using higher rate, approximately full stock length springs (maybe up to 1/2" shorter) with NB upper shock mounts to lower the car around 1/2" while maintaing more travel. I don't know what springs would make this work still just investigating it.

Or...perhaps not using the NB mounts and getting some 1/2" spacers under some lowering eibach springs to help regain some travel from lowering.

I have AGX shocks.

Has anyone tried this or heard any of this being done? Anyone ever tried FatCatMotorsports modified NB upper shock mounts or their bump stops? http://www.fatcatmotorsports.com/FCMmounts.htm

How does everybody deal with the lowering vs. lack of travel? I origianlly thought I could get by with stock springs but no longer feel that way. I want to lower and stiffen up.

Thanks for any comments