Hi
They are a very similar setup but the springs are different...
I have just finished lowering my 99 gs300 after almost 4 weeks of being stuffed around by pedders and a few other people..
Solution:
Call KMAC suspension speak to kenny and tell him what you want. They make them there, whatever height you want and they are exactly the same as the originals just shorter.
I ordered 2" lower and the car looks awesome drives well. No scraping,no bottoming out, nothing touching anything else and im running 20s. A little bouncier than the originals but there isnt too many ways around that.
I wouldnt recommend any lower than 2" as any lower will cause problems if you hit bumps and bad bits on the road. You dont want to bottom out those shocks too much they arent cheap to replace.....
I can email you some photos if you want or tell me how to attach pics on this site i cant figure it out..
Cheers