I battled a "cowl vent" leak for 5 years on my '50, (an older restoration), only to discover a small rust hole in the front of the groove where the seal is. It was too high to be sealed by the seal and would only be visible from a helicopter's view. I discovered it recently while stripping paint and removing rust to stop further deterioration of metal in that area.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission