1967-1987 C/K Series Trucks and Blazer/Suburban Radiator for LS and LT Engine Swaps
When swapping an LS or LT V8 into a 1967-1987 C/K Series SquareBody truck or SUV, the 1967-1987 GM Truck Radiator 20.75" Tall (Manual Trans) - HD Cooling provides an enlarged core height that increases coolant volume to stabilize temperatures during towing, slow climbs, and extreme heat. Manufactured in the United States from corrosion resistant aluminum, this radiator mounts directly to C/K Series SquareBody frames with factory aligned hose outlets and precision formed tabs, removing the need for trimming and preserving manual transmission linkage alignment. Offered in bare aluminum or black epoxy coat, it delivers superior thermal efficiency and rapid heat rejection with a lightweight design that reduces front mass and maintains chassis balance.
Precision Fit for 1967–1987 GM Trucks
The 20.75 inch tall radiator is engineered specifically for 1967 through 1987 GM truck frames equipped with a manual transmission. Core height, inlet and outlet locations, and bracket mounting points mirror factory dimensions to simplify installation. This exact sizing eliminates trimming or modification of inner fenders and support panels, allowing direct bolt-in replacement. Compatibility with LS or LT powerplants is assured when used alongside MuscleRods mounts, guaranteeing the correct engine setback and pinion angle. The result is a straightforward swap that maintains factory driveline geometry and minimizes vibration under load.
Robust Construction and Efficient Cooling
Constructed from premium grade aluminum, this radiator delivers rapid heat dissipation and corrosion resistance while reducing overall weight. The brazed tube-and-fin core maximizes coolant flow through a dense array of fins, expanding the surface area available for air to extract heat. At 20.75 inches tall, the increased core volume lowers operating temperatures under high-stress scenarios, such as towing or off-road use. By optimizing coolant circulation and airflow, this design reduces the workload on electric or mechanical fans, improving engine performance and fuel efficiency.
American Craftsmanship and Durability
Manufactured in the USA under stringent quality control processes, each radiator undergoes pressure testing and visual inspection to ensure leak proof integrity. Tank walls are CNC formed for uniform thickness, and all welds receive nondestructive assessment to prevent porosity. The finish resists chips, scratches, and chemical exposure, preserving appearance and function in harsh environments. Designed to work with original fan shrouds and mounting hardware, no aftermarket adapters are required, preserving the classic truck's authentic look and feel.
Seamless MuscleRods Integration
When combined with MuscleRods engine and transmission mounting kits, this radiator supports precise engine positioning to maintain ideal driveshaft angles throughout suspension travel. Proper alignment reduces stress on universal joints and transmission output shafts, extending component life. The coordinated design between radiator and mounting system ensures clearance between hoses, wiring, and exhaust headers, simplifying routing and preventing interference. This plug and play approach empowers builders to achieve reliable performance and professional fitment in restored or restomod GM trucks.
Trust MuscleRods quality for your LS or LT swap, and for the same radiator but with fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) with Fans - HD Cooling.