Anyone heard of dropzone springs?? Also, when you see these ebay bids... DropZone springs on ebay and they say 82-92 camaro/firebird, they will work on 93-97?

Any insight would be great guys, thanx..

Also anyone heard of Vogtland springs?? Here is the bid..
Vogtland springs

 

Only the rear springs on 3rd and 4th gens are the same size. I don't know the rates between the 2 off the top of my head.

The fronts are no where near the same.