Rich--I measured and found that the clearance in front under the sway bar as well as in the rear under the C.B. Performance thin line sump is exactly 6".
I also measured from the bottom of the door to the garage floor and that's 12". Then from the bottom of the body to the floor, 9". (The bottom of the body is 3" lower than the lower edge of the door.
I have neder scraped the sway bar. I did scrape the sump once when I drove straight out of my own driveway rather that at an angle. That scrape drone one of the acorn nuts further onto the stud and stripped both the nut and that end of the stud. A new nut and stud fixed it perfectly. I never want to bang it harder than that though.
My own feeling is that the way a Speedster "sits" defines a Speedster's looks. I like the height of my own car and feel it sits the way a Speedster is supposed to. Your mileagee vary.
Check this photo out.----Jack