thanks....yes it has an older Vintage Air system that was working fine with the original 400. I just never bothered to upgrade the compressor to get it working with the Ls3. They have just come out with a new system for 2nd gen's that finally adds a decent looking control panel. It is on the to do list some day.
The car is mini-tubbed. I originally planned on 335/30/18's back there and just couldn't see how it would fit even though others with my same exact set up have used this size successfully. I wish I would've never tubbed it, since the tires I went with will fit the factory wheel wells easily.
The car is actually too low or I need a panhard bar maybe. When I back into my garage which is barely pitched, the inside tire on the passenger side comes in contact with the upper wheel well in the back and stops the car immediately.
I'd rather not go with a lower profile tire as I really do like the look of a bit more rubber. Been waiting on advice from Ridetech.
The rears are 275/40/18's.