The original D-Series pickups offered a lot of power in a lot of different variations. The venerable Slant 6 made its debut in the D100 and if you checked the right boxes, you'd find a 413 cubic inch big-block resting in the engine bay. As for innovation, the 1st Generation D100 was the first vehicle to implement the alternator.

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.