I've been doing some research, and found that our notch back bodies don't do much for making wings mounted on the deck lid very effective. There's a lot of turbulence that gets created after the rear window, and wings don't like turbulence. The best way to have an effective wing on a notch back car is to raise the location of the wing off the rear deck lid until the wing is in 'clean air'. I'm thinking I may video tape some tape and ribbon testing on the car before I decide on a wing design and placement. I'm also starting to understand better why nascar changed their aero package on the cup cars. Very interesting stuff.