Ken,firstly welcome, Tim's right on the money, the aftermarket quality can leave a little to be desired.

You'll also hear stories of ill fitting windshields too.
Don't ask me how I know!

As far as the rubber seal is concerned,it's an industry standard 1/4" X 1/8" Claytonrite rubber that uses either a black or 'chrome' lock strip.
You can buy this by the foot.

It was and still is used commonly in many old vehicles.
Many auto glass shops that deal with 'older' vehicles should stock it.

Last edited by jockbolter50; 09/03/2010 7:31 AM.

1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.