Ive done a bunch of 1st gens, ive found that you really need to pull tight in the area around the sail panel. I would tug straight down at that last seam. Also is there a sailpanel headliner retainer spanning across your sailpanel, under the material you show in the second pic? There is one there on first gen camaros that helps to pull the wrinkles out of the corners, wondering if the chevelle is set up the same way Use a couple more clips at the corner of the back quarter window and tug tug tug. Becareful the listing strip at the last bow isn't to long, if its bunched up at the end of the rod its not going to strech out the wrinkles easy, they usually need a little trimming.
Rich
|