On 2001-05-04 15:02, HarleyB spewed forth this drivel:
Gundam...
If you crouch behind your Vette and look directly at the twin slots that are located at the lower outside part of the rear bumper cover, the small portion of bodywork below the openings should be parallel to the slots. Most Vettes have either a warp (the very lowest outside bodywork curves UP to, and is thinner in the middle) or a sag (the middle is fatter under the slots). The ACI supports are like a plastic shirt collar insert that keeps a new shirts collar looking perfect while still in the package. The ACI parts actually SNAP into place, as they are made so perfectly. The tell you to use some silicone sealant just for good measure, but they really fit tight. I hope that helps. If not, I'll try another photo.
HarleyB