LS and LT Engine Swap Radiator for 1967-1987 C/K Series Trucks and Blazer/Suburban
When fitting a modern LS or LT engine into a C/K Series truck, Chevy Blazer or Suburban from 1967 through 1987 with manual transmission, steady coolant control under heavy loads is a problem the 1967 through 1987 GM Truck Radiator with a 20.75 inch core solves. It offers increased coolant volume and a dense tube and fin layout along with precision formed mounting tabs and hose outlets that align with factory rails on C10 C15 K10 and K15 chassis. Aluminum construction limits front end weight while resisting corrosion in demanding climates. Owners will avoid custom fabrication and maintain reliable thermal performance during steep climbs, slow crawls and hot weather towing.
Direct Fitment with Precision Formed Mounting Tabs
The radiator features precision formed mounting tabs and inlet outlets that mirror the factory frame rail layout on 1967–1987 C10, C15, K10 and K15 chassis as well as Blazer and Suburban frames. By matching original hole patterns exactly, it removes the need for custom brackets or trimming, saving time and reducing alignment errors. Installers benefit from consistent positioning that accommodates manual transmission linkages and preserves firewall clearance. This accurate geometry ensures reliable hose routing and coolant flow without any fabrication or modification.
Expanded 20.75 Inch Core for Steady Thermal Control
With a core height of 20.75 inch, coolant capacity increases significantly to manage heat generated by modern LS and LT engines during demanding conditions. The dense tube and fin design promotes uniform circulation and maximizes surface area for efficient heat exchange. As ambient air moves through the core, heat rejection remains consistent under slow speed climbs, heavy towing and extreme summer temperatures. The result is stable engine temperature that protects internal components and supports lasting durability.
High Quality Aluminum Assembly for Weight Savings and Durability
Constructed entirely from premium aluminum, the radiator reduces front end mass compared to traditional copper brass units while maintaining structural integrity. Aluminum's superior thermal conductivity accelerates heat transfer from coolant to fins, enhancing overall cooling efficiency. Its natural resistance to moisture and road salt prevents pitting and corrosion, which is especially important in coastal or winter environments. The lighter assembly also improves suspension response and steering feel once a modern powerplant replaces the original engine.
Customizable Finish Options for Protection and Style
Builders can choose a clean bare aluminum finish that develops a subtle natural patina over time or select a black epoxy coating that adds a barrier against moisture and road debris. The uncoated look highlights mechanical details for vintage restorations, while the epoxy layer seals the surface to slow oxidation in harsh climates. Both finishes undergo strict quality inspections in domestic production to ensure consistent adhesion and visual appeal. This flexibility lets enthusiasts balance aesthetic preferences with environmental protection.
Trust MuscleRods to deliver reliable cooling for your LS or LT swap. For the same radiator but with fans see our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) with Fans - HD Cooling.