No problem, My 67 FB Cuda rusted out from the bottom rear back glass (like most). The problem is that you don't even know the corrosion is there until it starts showing around the trim. they when you remove the trim and rubber you realize that it's been rotting for a long time. Once the water/corrosion eats a small hole into the bottom of that trough you start getting rust into the trunk area. Anyway, I'm probably preaching to the choir!!!
Now that I have a pristine '69 Cuda I'm doing everything I can to make it last forever. If you use my method make sure and put some good type of undercoat in the trough before you install the rubber. Seal off the metal real good and it should never rust (even if water gets in there). Water can't corrode the undercoating. I used a liquid rubber type undercoat, you can bush it on and it bonds real good to anything.
