No matter the condition of your 1963 Eldorado, OPGI has the Heater Cores products you need to boost performance and get you back on the road. We currently carry two Heater Cores items to choose from for your 1963 Eldorado, and our Price Match Guaranteed prices range from as little as $38.99 up to $69.99. OPGI offers Old Air Products plus zero other trusted brands of Heater Cores products for your 1963 Eldorado, to help you find quality parts you can rely on. With OPGI's 45-day return policy and two customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Heater Cores items in person.