QA1 Tubular K Member - Who runs one on a street car? Reviews?

I'm seriously thinking of putting a QA1 tubular K-member and associated parts on my '69 Dart.
Who is currently running one on a street driven car?
Reviews?
Info?

Thanks in advance!
You need to be more specific. QA1 makes a tubular K that retains the torsion bars, and they have one that is a coil over/rack and pinion conversion.