Radiator for LS and LT Swaps in 1963-1966 C/K Series Chevy and GMC Trucks
Installing an LS or LT engine into a 1963 to 1966 C or K series Chevy or GMC truck calls for a radiator that fits the stock rails and plumbing without modification. This 1963 to 1966 GM Truck Radiator (Manual Trans) uses precision TIG welded aluminum tanks joined to a full aluminum core that channels coolant to ambient air with uniform flow and efficient heat shedding. Factory aligned mounting tabs and hose connections match manual transmission layouts, preserving clearance for the heater box and brake booster for a straightforward fit. With LS and LT compatibility built in this radiator delivers reliable cooling performance during towing or spirited runs and a bare aluminum finish that resists corrosion in salt or moisture prone environments.
Precision TIG Welded Aluminum Construction
Our radiator tanks and core are assembled with a 100 percent TIG welding process that creates exceptionally clean joints and minimal distortion. TIG welding delivers a concentrated heat zone that allows deep fusion of aluminum panels while limiting warping during the build. The result is a structure that stands up to repeated vibration and thermal expansion cycles without leaking or cracking. Every weld seam is inspected to ensure consistent penetration and pressure containment through demanding duties such as towing or spirited runs with LS or LT power. This rigorous approach translates to durable cooling performance that holds up under heavy load and extended operation.
Advanced Aluminum Core Design for Even Cooling
At the heart of this radiator is an array of aluminum tubes and fins arranged to promote uniform coolant flow and temperature distribution. The internal fin density and tube spacing are optimized to remove heat rapidly from the engine coolant and dissipate it to surrounding air. Lightweight aluminum equips the core with fast thermal response while lowering the mass at the front section of the truck and preserving the handling balance of a vintage C or K series. By eliminating local hot spots, this design helps maintain stable engine temperatures even during steep climbs or extended towing ventures. The efficient layout supports consistent operation that can adapt to sudden shifts in load and speed.
Bare Aluminum Oxide Layer and Epoxy Finish Options
This radiator is available in a raw aluminum finish that naturally develops a protective oxide layer or in a multi stage black epoxy coating. The oxide layer that forms on bare aluminum sticks tightly to the metal and prevents moisture or road treatments from penetrating the surface. For drivers seeking an enhanced look and added resilience, the epoxy finish is applied in several coats and oven cured for strong adhesion through high heat cycles. Both surfaces go through strict quality checks to validate even coverage and long term resistance to chips and corrosion. These options ensure the radiator remains serviceable and visually appealing in climates where moisture and salt are routine challenges.
Direct Fit Installation for 1963 to 1966 C and K Series
Engineered for direct fit into 1963 to 1966 C10, C15, K10, and K15 frames, this radiator drops in without the need for trimming or fabrication of mounts. Factory aligned mounting tabs and hose outlets match manual transmission plumbing and maintain original clearances for the heater box and brake booster. This plug and play solution eliminates the time spent on test fitting and reduces the possibility of leaks due to misaligned hoses. By preserving the stock firewall to core spacing, the design ensures maximum airflow through the fin pack for dependable cooling under all driving conditions. Built locally, it offers a precise fit and finish that reflects superior craftsmanship and helps maintain the value of a restored GM truck.
To get the same radiator but with fans, consider our 1963-1966 GM Truck Radiator (Manual Transmission) with Fans for reliable cooling under towing or spirited driving conditions.