I havn't hears of any Harneys being built on the Torsilastic chassis. The construction method was unique in that the "house" was built as a unit and then mounted on the chassis in one piece. A couple of interesting factiods, the "rubber ride" or Velvet ride suspension was built by Firestone for use in emergency response vehicles to allow them to move off on the alarm rather than waiting for air up in the chassis and to eliminate a rather elaborate air system to be maintained and is a possible failure opportunity. They had "air over hydraulic" brakes that mystified mechanics when they first encountered them not having seen air brakes that had a hydraulic master cylinder. The rubber ride chassis had an air compressor in the storage bay to run the brakes. Having driven both chassis i didn't like the rubber ride as it was stiffer and a bit harsher over the bumps. The company line was that it drove like a Testerosa as opposed to a Sedan DeVille.