LS and LT Swap Radiator for 1967-1987 C/K Series Trucks and Blazer/Suburban
Swapping an LS or LT into a classic C/K Series truck or Blazer can create coolant path issues and clearance conflicts so the 1967-1987 GM Truck Radiator 18.5 inch Tall Auto Trans is designed to solve them. Preserving factory inlet and outlet locations and matching core height ensures hose runs stay tension free and avoids custom modifications. Precision welded seams, corrosion resistant aluminum core and integrated transmission fittings maintain coolant flow under towing loads or slow traffic. As a direct drop in solution it cuts installation time and holds mounting tabs and hood clearance exactly where the factory intended.
Precision Geometry Preserving 1967 to 1987 SquareBody Coolant Path
Integrating an LS or LT into a classic SquareBody demands exact alignment of mounting points and coolant routing. The core height precisely matches the original 18.5 inch dimension to maintain hood clearance and ensure uniform airflow. Factory inlet and outlet locations remain unchanged so hose runs avoid tension and premature wear, reducing the risk of leaks at connection points. It also maintains original fan shroud alignment to maximize cooling efficiency from mechanical or electric fans. This alignment preserves the intended geometry of the C and K Series chassis and eliminates the need for trimming, shimming or custom brackets. Installers benefit from a true drop in solution that speeds project completion.
High Grade Aluminum Core Maximizing Heat Rejection
At the heart of this radiator lies a high grade aluminum core engineered with expanded tube and fin architecture to boost surface area for heat exchange. Aluminum's natural thermal conductivity moves heat out of the coolant more efficiently than traditional metals. This design excels under sustained towing or stop and go traffic by preventing heat soak and temperature spikes. The lighter weight of aluminum reduces front end mass, improving steering response and contributing to marginal gains in fuel economy. Its innate corrosion resistance helps maintain coolant flow and system pressure over many seasons of use without internal pitting or scale buildup.
Integrated Transmission Cooling Path with Durable Weld Seams
Automatic transmissions generate excess heat that must be removed to protect internal components. This radiator includes integrated transmission fittings that align with the GM unit's cooling ports, enabling direct connection without aftermarket adapters. Precision TIG weld seams reinforce these junctions to withstand elevated coolant pressure and engine vibration under load. The robust joints also prevent leaks and seal integrity issues even during towing or spirited driving. Engineers calibrated internal flow pathways to handle high volume water pump output and ensure steady circulation at idle and highway speeds, preserving stable coolant temperatures under all driving conditions.
Protective Coating Options for Lasting Corrosion Resistance
To guard against corrosion and chemical exposure, this radiator is available in bare aluminum or a black epoxy finish. The uncoated core allows visual inspection of tubing and fin condition, making it easy to detect early wear or damage. The epoxy option provides a dense protective film that resists road salt, oil stains and moisture intrusion while preserving heat transfer capability. Both finishes undergo strict adhesion and thermal cycling evaluations to ensure lasting performance in fluctuating temperatures. Owners can choose the finish that best suits restoration authenticity or functional durability needs, enhancing long term value.
To complete your cooling system with the same radiator but with fans consider our 1967-1987 GM Truck Radiator 18.5" Tall (Automatic Transmission) with Fans for enhanced airflow and reliable performance.