The 2nd Generation D100 debuted midway through 1965, now sporting two headlights instead of four. Three new engines were added as options including a 440 cubic inch big block during the 2nd Generation's production run. In 1968, a the D100 received a midlife facelift and new trim levels including the Adventurer and "The Dude" trims.

These Engine Oil Thermostats Allow the Engine Oil to Warm up to the desired temperature before sending it to the oil cooler. This makes the engine more efficient and allows for the oil to warm up quicker for improved performance & engine durability.