1967-1987 C/K Series Trucks, Blazer and Suburban Radiator for LS and LT Swaps
When swapping a modern LS or LT engine into the frame of a 1967 to 1987 C/K pickup, Blazer or Suburban, stock cooling assemblies can struggle to hold temperatures steady under heavy towing and slow speed climbs. This 20.75 inch tall radiator for manual transmissions delivers LS and LT compatibility with extra coolant volume and a dense tube and fin core that moves heat into the air stream consistently. Precision formed mounting tabs and inlet outlets match factory frame rails and hose connections to eliminate fabrication and trimming. Aluminum construction resists corrosion while cutting weight from the front of the chassis for improved handling after the swap.
Precision Formed Mounting Tabs for Direct Swap Fitment
The radiator's mounting tabs and inlet outlets are engineered to align with factory frame rails and original hose connections on C10, C15, K10 and K15 pickups as well as Blazer and Suburban models from 1967 to 1987. By matching the stock positions exactly, this design removes the need for custom brackets or trimming, saving both time and frustration during installation. Technicians can rely on consistent hole patterns and mounting points that reduce alignment errors and eliminate the guesswork often associated with modern engine swaps. This precise fitment approach supports a streamlined assembly process for professional shops and home builders alike.
Expanded 20.75 Inch Core for Superior Thermal Control
With a core height of 20.75 inch, this radiator increases coolant capacity and surface area to manage heat more effectively during slow speed climbs or heavy towing. The dense tubing and fin layout encourages steady coolant flow and rapid transfer of heat into the passing air stream, maintaining stable engine temperatures under extreme summer conditions. Avoiding hotspots is critical when blending a modern LS or LT engine with a classic cooling system, and the larger core dimension meets that need. Steady thermal management helps safeguard internal engine components and supports long term durability.
High Grade Aluminum Construction for Weight Reduction and Corrosion Resistance
Constructed entirely from premium aluminum, the assembly offers significant weight savings over traditional copper brass designs without compromising strength. The metal's natural resistance to moisture and road salt reduces the chance of pitting or degradation, ensuring reliable performance in harsh climates. Aluminum's superior thermal conductivity allows heat to travel quickly from coolant to fins, further enhancing cooling efficiency. Reducing front end mass also improves suspension response and steering feel once the LS or LT engine is in place.
Flexible Finish Options to Match Build Style and Protection Needs
Builders can choose between a clean bare aluminum finish that develops a subtle patina over time or a black epoxy coating that provides an extra barrier against moisture and debris. The uncoated look highlights mechanical details and fits a vintage restoration aesthetic, while the epoxy layer seals the surface and slows corrosion in coastal or winter climates. Both finishes undergo strict quality checks in domestic manufacturing to guarantee consistent adhesion and visual appeal. This choice lets enthusiasts balance appearance with durability requirements for any swap project.
Count on precise fit and steady thermal control for your LS or LT swap. For the same radiator but with fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) with Fans - HD Cooling.