Complex sentence: For 1965 the engine was updated to the four-barrel carburetor version of the 289-cid motor, which strangly enough only produced 200-hp (149.1-kW).
Split into simpler sentences: For 1965 the engine was updated to the four-barrel carburetor version of the 289-cid motor. Which strangly enough only produced 200-hp (149.1-kW).