Of course, you can also get competition prep manuals for the GT6, so that removes a lot of the guess work normally involved with oddballs. The "fixed" suspension was for the Mk I models which predate the ITA spec line, so no problem there. Im not sure if the ITCS spec refers to the Mk II or Mk III models. Im assuming the Mk III, since they had a production run from 1970-1973. If you think that 130 hp is possible, thats a good ratio considering the race weight is 2005 lbs. Im thinking it really could be as fast as say a first gen RX7... Not cutting edge, but not a slug either.....