I also read they were able to move the engine rearward to even the weight bias. I could not find something to confirm that bit.
Reading the link below - I suppose loosely interpreted you could have a C5R block and meet stock displacement.
http://www.speedvisionwc.com/carfacts.html
Grand Touring (GT): Includes a variety of production displacements with no maximum. Forced induction is permitted and is used to equalize individual models. Sedans, coupes, convertibles and two-seat models are permitted. The cars can be rear-wheel, or all-wheel drive. Class horsepower range is 425-550 bhp.
There were some people talking about body modifications to the CTS-V. This link has some talks about it:
http://www.theracesite.com/index.cfm?paget...rm_article=6513
"As to the seemingly extreme body modifications Coalwell said, "the only unfortunate thing is that the CTS-V has such a high stock ride height and the "flat-sided" body, the race body looks quite a bit different from stock because when they lowered the car the 5" to get down to the permitted 3" minimum ride height they had to move the wheel arch up the side of the fenders and trim the bottom of the bodywork so that it did not drag on the ground."
[edit] I guess they could have taken a full sized van and made its ride height 3" tall and won last weeks race.
