Elevate the functionality of your classic Pontiac with this authentic Firebird GTO crank pulley, a vital component for the smooth operation of your vehicle's air conditioning system. Crafted in the United States during the late 1960s, this pulley is a testament to the era's robust engineering, ensuring compatibility with your 400, 428, or 455 engines. Featuring the original manufacturer part number 9790843, this crank pulley is a non-performance, vintage part, specifically designed for the YC Ram Air models from 1968 to 1970. Preserving the integrity of your classic ride, this genuine Pontiac accessory guarantees reliability and efficient cooling, maintaining the legacy of your Firebird GTO.