Actually, two out of three Corvairs made it:

In 1961, a team of three 1961 Chevrolet Corvairs and several support vehicles departed from Panama. The group was sponsored by Dick Doane Chevrolet, a Chicago Chevrolet dealer and the Chevrolet division of General Motors. After 109 days they reached the Colombia Border with two Corvairs, the third having been abandoned in the jungle. This was the first crossing by a standard two wheel drive passenger car. It has been documented by a Jam Handy Productions film along with an article in Automobile Quarterly magazine (Volume 1 number 3, from the fall of 1962).

The whole thing is a mess, no one seems to be able to maintain a ferry service, the area is a hotspot for various armed groups involved in whatever the conflict of the day is. People are still doing it, but it isn't popular and/or newsworthy.

MV