There are many different types of these vents, the correct vent could be steel or pot material by 1953 and point toward the firewall. I believe the straight drop vents were used beginning in 1954 which may explain the problem.
http://www.flickr.com/photos/advance-design_parts_co/8129304663/in/set-72157631868452754
http://www.flickr.com/photos/advance-design_parts_co/8129366046/in/set-72157631868452754
http://www.flickr.com/photos/advance-design_parts_co/8129365900/in/set-72157631868452754