I've seen some info which I thought was very informative and felt like it needed to be here. Please add your own!
Jim Schenck emailed to Plavan:
Originally Posted by C.Plavan
"Chad,
Sorry for the delay here.
The low ride height is something we designed into the chassis to allow for building a dedicated track car only that you are willing to compromise any street use as well as things like trailer and lift access. The standard donor package still assumes the higher ride height so there is some sourcing of parts needed to do the low ride height.
What you need if you want to run the lower ride height (not recommended for street use) This ride height is also only set up for Sedan control arms.
Move the upper control arm to the top of the chassis and put 4 .815 spacers in the old arm mounting locations to strengthen the new mounting location. Longer bolts will be needed to mount the arms on the top.
Mount the front lower control arms in the upper set of holes on the front mounts.
For the rear bushing mount on the control arm the inner mount bolt should be spaced up by .875 and the outer bolt should be mounted on top of the plate with a .400 spacer as a starting point. The height of the rear mount can be raised if you would like to dial anti-dive into the chassis as a tuning tool.
Running the low ride height requires the use of a bumpsteer kit because the steering rack stays in the same chassis location. We used the Baer kit but drilled out the spindles and replaced the tapered shaft with a longer bolt for more adjustment.
In the rear the low ride height mounts will only work with adjustable control arms. The easiest and intended set-up is to use 13 inch long swaged tubes with 3/4 shank rod ends that have 5/8 holes. We then drilled the rear spindles out just a hair to allow us to use the standard size rod ends and a 5/8 cross bolt.
Hopefully that gets you started in the right direction, there is lots of adjustment that can be done and when you are ready I can also give you our baseline setting to start out from if that helps.
Jim"
I thought the part "In the rear the low ride height mounts will only work with adjustable control arms. The easiest and intended set-up is to use 13 inch long swaged tubes with 3/4 shank rod ends that have 5/8 holes. We then drilled the rear spindles out just a hair to allow us to use the standard size rod ends and a 5/8 cross bolt." to be particularly helpful.