How about
this? Bret's car has our front clip and a gLink with airsprings at all four corners.
Getting your car lower than it now sits and still using coilovers is going to sacrifice a significant amount of driveability. Chevrolet decided how low your Camaro could sit in 1966. Getting a lower driving height is going to require modifying the driveshaft tunnel, floor, and frame rails. Read
THIS DOCUMENT for an in depth explanation of this. It also covers the other concerns you mentioned.
On the other hand, if you want the car to sit super low, be driveable, and take it to the next level in performance we still have options. How about
THIS SYSTEM?
