Overview
The fifth generation of the Ford F-Series is a line of pickup trucks and commercial trucks that were produced by Ford from the 1967 to 1972 model years. Built on the same platform as the fourth generation F-series trucks, the fifth generation had sharper styling lines, a larger cab, and expanded engine options.
Three trim levels were available during the production of the fifth generation F-series, though the names were changed in 1970. The "Base" trim became the "Custom" and the "Custom Cab" became the "Sport Custom" joining "Ranger" as optional levels of equipment and trim. Late in production the Ranger trim level was upgraded with the additional "Ranger XLT" option.
Year by year changes
1967: Introduction of fifth-generation F-Series in 1966 for the 1967 model year. Cab is wider than predecessor and frame is heavier. Grille, exterior trim, interior cab fittings and engine choices are unique to this year. Trim levels are "Base", "Custom Cab", and "Ranger".
1968: As federal regulations required all automotive manufacturers to install side marker reflectors or lights, Ford redesigned the hood emblems to incorporate reflectors as well as added reflectors to the rear of the bed. Interior fittings changed due to new safety standards. New versions of the FE-Series engine added (360 truck and 390). First year of factory-installed air conditioning (air conditioning was installed by the dealer before 1968).
1969: New grille design, new 302 Windsor V8 engine option.
1970: Mid-cycle update with many detail changes including a completely new grille including wraparound front turn signals, exterior trim changes, and new side marker lights. "Sport Custom" trim replaces "Custom Cab", and "Ranger XLT" added as top trim level.
Argentina
A new engine choice to the local market is introduced in that year: the diesel engine, which was a Perkins 3.3 L (203 cu in) l4 engine with 120 hp SAE at 3,000 RPM.
Also, another change is the alternator, replacing the dynamo.
From Wikipedia (CC BY-SA 4.0).