Exhausted And silenced
That's it for the back end then - apart from trivia like bodywork, plumbling, wiring and component fit and finish. Interesting to look at this with reference to recent comparisons of the length of other rear-engined FFs. It's pretty obvious that the easiest way to get down to motorised bicycle wheelbase levels would be to use electric power - allowing much better packaging arrangements. I think, without actualy checking the CADs, that the E-GP racer we failed to produce in 2010 had a shorter wheelbase than this.
However there's still no money to buy that £12K e-powertrain and as a 72.5" wheelbased Quasar worked rather well on-track, it's amusing to look at another option. There's a lot of room in the engine bay that isn't engine. Wouldn't it be rather fun to replace all that space - and some of the structure - with one or other of the V4 motors that are around? Rotax? Aprillia? Just in case 90BHP coupled to NSU Hammock-style frontal area isn't fast enough. 180BHP, with the same frontal area, should solve all speed-related issues.
And the vertical mounts at the extreme rear end? Well, you've got to mount the rear wing on something.