Originally Posted by mp4659

So right off the bat, caging the aluminum chassis adds a pretty significant expense as it is a lot more work. Then there is the debate of what is the correct way to mount the cage to the chassis. Welding aluminum mount plates to the frame, thru-bolting, rivnuts etc. Welding alum. mount plates to the frame provides the most direct attachment to chassis but to some extent you risk annealing the aluminum frame. Thru-bolting presents some challenges, mostly in how and where you are thru-bolting and accessing sandwich plates etc. I know there are some very strong rivnuts out there, but I wasn't comfortable (personally) trusting my cage attachment to them but I have seen it done. The other factor to consider....repairablilty. It's racing, crashing happens, as I've painfully already learned. I put the car in the tire wall my first time out with car after I hit some water that puddled off curbing. Luckily, other then a bent rear control arm the damage was strictly cosmetic, and yes I did have the car on a frame rack to check for straightness. (Phew!). That being said, a steel chassis is much easier to repair.

Originally Posted by C5ZEE06

That said...can anyone chime in....whats the advantage of starting with the Z06 chassis vs a Grand Sport chassis for a similar build ? I would think the LS3 can be tweeked to produce numbers pretty close to a de-tuned LS7...anyone ?