I have worked in 2008/2009 in StockCAr and have seen the new new car during the first tests. THe price is about correct, this was for a race ready car without engine. The engines in StockCAr ar on a lease contract from one company.
It´s not a bad price for a a car with X-trac gearbox and AP brakes. Biut it is the sales price, so the company who buids them makes some profit too.
I just have shown the photos, so that you can see the chassis structure with the straight tubes. It´s quick and easy to produce. They pre-produced large sections on welding jigs, and then assembled the final chassis quickly. It´s a nice and effective system. As I said, all the tubes are straight and the connections are all laser cut, so no fiddling around with cutting the tubes to fit. It´s a very efficient production process.
What is expensive on this car is the gearbox. But it lasts the whole year, and has made zero problems so far.
Temperature inside the car, is a problem, and they have changed the exhaust layout after two races in 2009.
I would think that a rear /mid engine is better for a rear wheel drive (RWD) car.
Think about to use a complete front wheel drive engine/gearbox combo and run it in the rear. Then you can fit a limited slip diff and some internals to make the gearbox last. - Like an Toyota MR2 or Rover MG-F layout. I think you get anPedalshift for the MR2. maybe you can modify this sytem.
If you make a car based on a motorcylce engine gearbox, you will need to make it as light as possible - IMHO, and you need to think about the differential.
The light sportscars with motorcycle engines use a chain drive to the rear axle in some cases. A Pedalshift system with a motocycle gearbox is relative easy to build, as the gearbox is sequential shift allready.
THe STockCAr uses a common fibre glass centre section for the bodyshell, and then you have different front and rear modules for the two different models/makes (Peugeot/Chevrolet-Opel).
Depending from where you want to build your car, the price is a bit low, if you try to build it in Germany,France, Belgium etc, because labour (man hours) are expensive.
If you build it in China, South America or East Europe it´s possible - IMHO.
"Make the suspension adjustable and they will adjust it wrong ......
look what they can do to a carburetor in just a few moments of stupidity with a screwdriver." - Colin Chapman
“Simplicity is the ultimate sophistication.” - Leonardo da Vinci