Thanks for posting this! I just put one in myself after watching and it went very smoothly. Just use suction cups inside so you can pull and work the seal at the same time. Jump out and slap it all the way around every so often and it goes right in.
Did one just like this on 1965 Chevy truck. Had it almost in place, when i heard a pop. Broke on the to right corner. One crack all the way to the bottom. I setled for that.
Let this be a lesson to everyone restoring an old vehicle. Restore and reuse a many as the old parts off the original vehicle that you can! The after shit expensive and will definitely not be as good as the original parts! I guarantee ya!!