In October 1964, the 1965 F-Series was introduced an all-new frame which underpinned the F-Series until 1979 (in contrast, the body remained largely unchanged); consequently, many parts from the 1965-1979 model years are interchangeable such as brakes and motor mounts.
In 1964, the venerable 300-cubic inch (4.9 L) and 240-cubic inch (3.9 L) straight six was introduced.