The 327ci L75 V8 was equipped from the factory with a single four-barrel carburetor for a factory rating of 300 horsepower. The wiring harness was replaced.The engine stamping includes sequence 3113681, which matches the last six digits of the vehicle’s serial number. The RD suffix corresponds with a 300-horsepower, 327ci V8 for use with a manual transmission.Power is sent to the rear wheels through a four-speed manual transmission and an optional Positraction differential.The NCRS Shipping Data report lists a GM official production date of April 24, 1963.The three-spoke steering wheel frames a 160-mph speedometer and a tachometer with a 5,300-rpm redline as well as gauges for amperage, oil pressure, coolant temperature, and fuel level.The five-digit odometer shows 60k miles.