How do you determine "ride height" to make suspension mods??

Demon
I have gone down the same road, and the offset was an issue with a stock length rear axle. I am running 315ZR17 on the 17"x10.5" bullits with everything set my ground clearance is 4.5" at the frame rails. However the coil-overs are at the lowest hole on the lower supports I can always raise the car twice by 1.5" increments.
I would love to run the 335 KDWs but I don't know if they will mount on the 18x10s. According to BF Goodrich the rim width range is 11.5"-12.5"
The Bullit rims 18"offset is actually .7" greater than the 17" that I have.
the pic is at ride height, your look should be close.
Andrew

Andrew -- Your right the 335 KDw's will not mount to a 10.5x17 rim. You need to run the 11.5-12.5 rim. That's why i had to toss out the idea of running a set of the Bullet rims... Instead i will be running a set of Billet Specialties 18x12 Mag G wheels. These will mount up nice to the 335 KDW tire. The mock up wood wheels in my pics about are based on the dimensions of the 335 on a 12" wheel. They fit good. and the nice part is I can order the BS in a wide range.... So there is a good chance I will not have to cut my stock a body housing down to work. (We will see thou) Derek