Need help keeping up with C6 Z06 & Porsche GT3 on Road Course

I am building something very similar to your car. I would recommend ditching the heavy and expensive Dana and go with a 8 3/4. For handling purposes the car has to be as light as possible with an emphasis on unsprung weight. I can't stress this enough! Look at the supension on a newer Vette, Viper, Porsche, etc. and you will find spindly little aluminum arms and rods that look barely strong enough to support the the car let alone take 1+ g's in the turns.

Talk to Dick at Firm Feel. He knows his stuff when it comes to torsion bar suspensions in these cars. He built a setup for me that uses '73/up b-body LCAs and his tubular UCAs. I don't know much about the "geometry corrected" arms. What exactly are they trying to correct? Stock geometry in these cars is pretty damn good and doesn't need improving IMO. What does need improving is jounce travel. When you lower the car enough, you will use up your jounce travel (wheel moving up into the fender) leading to a potentially serious situation where the suspension goes solid. You definitely want to keep the bump stops! The b-body LCAs are curved rather than straight, giving you a little more travel. They also widen the front track by 2" requiring a wheel with a large offset.

As far as running them down, Vette owners are mostly mid-life crisis pussies that can't/won't push the car to it's full potential. Should be a piece of cake! :toothy7:

As far as Vipers being tubs compared to the 'Vette, remember the Viper OWNS the track record at the famed Nurburgring race track for production vehicles, beating the 'Vette as well as many other cars.