I've installed them on newer trucks with a 1/4" rope. I might be nervous doing it with a hard-to-find windshield though. Might be better to pay the professional.
1953 Chevrolet 3600 Fried Green T'mater (Vern) In the Stovebolt Gallery Caution: Political Statement Man who runs in front of car gets tired, man who runs behind car gets exhausted.