20.75 Inch Radiator for LS and LT Swaps in 1967-1987 C/K Series Trucks
Swapping an LS or LT engine into a 1967 to 1987 C/K Series truck raises core cooling demands that stock radiators cannot meet, and this HD Cooling 1967 to 1987 GM Truck Radiator 20.75 inch tall for automatic transmission directly addresses those challenges by fitting factory mounts and increasing fluid capacity. Crafted from corrosion resistant aluminum with precision fin geometry it delivers uniform heat exchange across the full core height. With its expanded coolant capacity the radiator smooths thermal peaks during heavy towing slow crawls and summer heat. Its light weight reduces front end mass while the durable build offers reliable service life.
Precision Core Design for Stable Heat Exchange
At 20.75 inch tall core the radiator uses precise fin spacing to expose coolant channels to airflow. Fin geometry delivers uniform heat exchange across the entire height of the radiator to prevent localized hot spots. This approach protects head gaskets and bearings from excessive thermal stress. By smoothing out thermal peaks the tall core ensures temperature stability during steep climbs and slow speed towing as well as prolonged highway runs. The tall core height also aligns with factory mounting points eliminating the need for custom brackets on most 1967 through 1987 C slash K series pickups.
All Aluminum Construction for Rapid Heat Dissipation
Constructed from high quality aluminum the radiator benefits from the metal's superior thermal conductivity and natural oxide barrier. Rapid heat transfer through the aluminum walls allows the engine to reject heat quickly under load. The bare finish further aids cooling by avoiding any insulating coatings. Weight is kept to a minimum which reduces stress on suspension components and mounting brackets and helps preserve steering feel. Made in the USA classification ensures rigorous quality control and consistent fitment for automatic transmission applications.
Expanded Coolant Capacity for Heavy Towing Conditions
By increasing coolant volume beyond factory levels this design buffers against rapid temperature spikes when hauling heavy loads or crawling over rough trails. Larger capacity also improves performance in stop and go traffic or in hot ambient conditions by giving the coolant more time to cool before recirculating. In mountain passes where ambient temperatures and engine load both climb this extra coolant mass acts as a heat sink to smooth out load cycles. The added reserve maintains stable temperatures under sustained stress and reduces the risk of overheating. Extended intervals between fluid changes are supported by the fact that cooler coolant degrades more slowly during regular operation.
Bare Aluminum and Epoxy Black Options for Durability
Choose the raw aluminum finish to maximize heat rejection or opt for the black epoxy coat to guard against corrosion and road debris. Both coatings are applied in house to offer consistent protection without blocking airflow through the core. The epoxy layer adds a robust barrier suited for humid or salty environments while preserving the slim profile of the radiator. Cleaning is made simple and each finish adds a refined appearance to suit both classic and modern engine bays. Neither finish impacts the slim profile which is critical for clearance in tight engine compartments and under shrouds.
Built to last and designed to maintain stable engine temperatures under heavy load. To complete your setup with the same radiator but with fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Automatic Transmission) with Fans - HD Cooling.