my current design project, a jaguar xjs race car designed to group 5 rules (google Hist_App_J_81_Art_269_a).
tube frame chassis (not shown in the chassis pic, but what is left of the steel body after being cut to bare bones would be welded to it)
twin turbo V12 ( would have to put out in the region of 850-950hp to be competitive with cars like the 935's and zakspeed capris)
front tyre: 25.5X12.5R16 rear tyre: 27x15-17 or 27x15-18
I'm not planning on building this as it would simply cost to much and take too much time (ive got another project that I do plan on building) the wheels and tyres alone would cost more than most entire cars.