I was mostly looking to extend the front bumper spoiler into a full body kit, something more or less like in the attachment (mutilated from an original image from here). Or maybe another way to look at it, connecting the front and back wheel spoilers with a body kit, like shown here:
http://en.wikipedia.org/wiki/File:'81_Chevrolet_Camaro_Z28_(Centropolis_Laval_'10).jpg
And yes, extending that body kit to the rear valence too.