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1948 Willys Overland Jeep Truck Go Devil Engine

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The Go-Devil engine was still a reliable and economical powerplant, but it was a bit overwhelmed in a truck with a full load. It made 55 net horsepower at 4,000 rpm (63 advertised gross horsepower) and 101 net lb-ft (105 gross advertised) of torque at 2,000 rpm. This is the original engine that came with the truck. A high-altitude, high-compression head was optional with this engine, which bumped the compression ratio from 6.48 to 7.0:1. It was usually painted yellow. There were some power and torque benefits at sea level with this head as well, usually around 2 to 4hp and 5 lb-ft of torque. fw