They've run theses HTM's at a couple of the IHBA races at Firebird. The owner of HTM was trying to get this class expanded beyond just HTM's right before his accident. There really weren't a lot of rules outside of it having an outdrive! Never heard anything else about this, might just be a demonstartion show. Was always cool to see them run, they looked so big compared tp the little flatties and hydros.
http://www.justanothertoy.com/photog...s/PA261620.JPG
http://www.justanothertoy.com/photog...s/PA261621.JPG
http://www.justanothertoy.com/photog...s/PA261625.JPG