First off, do you have a V6 or V8?
Makes a differance on what type of springs you want.
You could "box in" your existing stock ones, but would
have to remove them from the vehicle, buy some quality
steel ( mild steel pieces will do) , have them cut to fit,
then welded to the LCAs, then replace the old, worn
out rubber bushings with polyurethane, or polygrahite,
your choice ( polyurethane is easier to find), make sure
to buy greasable ones, then sand, prime, and paint to
whatever color you want, then finally install them in
you car. I'd rather spend the extra dough and buy
already better made ones from Spohn, save some
time too!
I'd go with Spohn for EVERYTHING!
Get ALL of your suspension stuff through them.
They make everything specifically for our cars.
Most of my suspension parts I bought through them.
I would have got everything, but they did not have any
steering braces ( wonder bars) or any SFCs ( subframe
connectors) available at the time.
I'd go with all adjustable parts too, especially of you
plan on lowering your car. But it's up to you.
I've shopped around quite a bit for suspension parts
found that Spohn not only offers better quality parts,
but most of them are cheaper!
Heres' the link ( also on top of this website!)....
http://www.Spohn.net