The Ford Work-Truck Inline-Six That Makes Over 600 HP On The Stock Block

The article spotlights Ford’s F-Series inline-six “Big Six” engine and why it’s become a favorite among hot rodders looking for big power without breaking the factory block. It traces inline-six durability back through automotive history, noting key milestones from Spyker’s 1903 naturally aspirated design to Napier’s 1904 mass-produced inline-six. Ford introduced its 300 cubic-inch version in 1965, derived from a 240 inline-six bored and stroked to 300ci. Initially rated at 170 hp and 283 lb-ft, it stayed in production from 1965 to 1996 and served as a base engine starting in 1975, extending beyond pickups into applications like pumps and farm equipment.