LS and LT Radiator with Fans for 1963-1966 C/K Series Chevy GMC Trucks Manual Trans
Swapping an LS or LT powerplant into a mid sixties C/K Series truck with a manual gearbox often overwhelms the stock cooling setup so the 1963 to 1966 GM Truck Radiator (Manual Trans) with Fans ensures stable coolant regulation during towing and stop and go driving. Featuring a full width aluminum core fully tig welded for uniform heat rejection this radiator pairs with twin electric fans that activate only when heat thresholds demand extra airflow. Mounting brackets drop directly into factory frame points on C10 and K10 models to preserve alternator alignment and accessory drive geometry without any trimming.
Precision TIG Welding for Uniform Heat Transfer
The radiator's core and tanks are joined by a full TIG welding process that preserves the metal's native thickness at every seam. By avoiding filler interruptions, this technique maintains direct aluminum-to-aluminum contact, allowing heat to flow evenly from coolant passages into the fin array. This uniform transfer eliminates hot spots that can lead to boil-over or premature fatigue in stop-and-go driving or heavy towing. The result is a robust structure that resists vibration damage and seal failure over countless thermal cycles, ensuring reliable temperature control for LS or LT installations.
Adaptive Dual Electric Fans with On-Demand Activation
Equipped with two brushless fans, this system monitors coolant temperature and engages airflow precisely when extra cooling is required. By running only at critical thresholds, the fans reduce alternator load and free up electrical capacity for lighting or audio upgrades. Their full-face mounting ensures even air distribution across the entire 28.25-inch core, preventing localized heat buildup that can undermine performance under duress. Rapid response in low-speed traffic or during heavy payload hauling keeps temperature swings minimal without manual intervention.
Coating Options That Enhance Protection and Efficiency
Builders can choose between a classic bare aluminum finish or a durable black epoxy coating, each applied at controlled thickness to maintain bracket alignment and shroud fit. The uncoated surface maximizes radiant cooling by exposing pure aluminum, while the epoxy layer guards against corrosion from road salt, moisture, and chemicals. Neither finish impairs thermal rejection, so cooling performance remains consistent whether subjected to desert heat or coastal humidity. Both treatments contribute to extended service life and simplified maintenance in varied environments.
Authentic Drop-In Fitment Preserving Accessory Geometry
This radiator aligns with factory frame mounts on 1963-1966 C10 and K10 Chevy and GMC trucks equipped with a manual transmission, eliminating the need for trimming or adapter plates. The bracket locations ensure alternator position and belt path remain unchanged, preserving charging efficiency and accessory drive balance. Critical dimensions are verified to factory tolerances, so the radiator installs as easily as the original unit yet offers vastly improved heat rejection. The American-made design delivers dependable fit and finish, allowing builders to focus on performance upgrades instead of modifications.
Count on consistent temperature control on every drive. For the same radiator but without fans see our 1963-1966 GM Truck Radiator Manual Transmission.