All you need is a new window seal, small diameter rope, silicone spray and a couple of extra hands to help. Install the seal on the glass, wrap the inner part of the seal with the rope and spray the seal with silicone. Set in place with the rope to the inside of the cab and have the extra hands applying pressure from the outside. Start pulling the rope so the seal flips over the flange of the cab while a helper follows you from the outside. It should go quick on a 65, the 63 and older trucks windshields wrapped around the A pillar and made it a bit more difficult to install.
Good luck,
Scott
