1967-1987 C/K Series Manual Transmission Radiator for LS and LT Swaps
When fitting an LS or LT mill into your 1967 to 1987 C/K SquareBody, sustaining stable temperatures is crucial. The 1967-1987 GM Truck Radiator 20.75" Tall Manual Transmission HD Cooling unit steps in with its dense core to increase coolant volume and speed heat rejection. It installs directly into manual transmission C10 and K10 pickups, Blazers or Suburbans without cutting or modification. Crafted from premium aluminum, this radiator offers lasting durability and resistance to corrosion under demanding driving conditions.
Enhanced Heat Rejection with 20.75 Inch HD Core
The tall 20.75 inch core dramatically increases coolant volume and surface area, allowing heat to move away from the engine faster than standard radiators. This dense design promotes consistent coolant flow across more tubes and fins, which translates into stable temperatures during steep climbs or crawling through traffic. By optimizing the path for air and liquid to interact, the radiator maintains ideal operating conditions even in severe summer heat. This feature is especially important for LS and LT swaps, where upgraded power output can generate significantly more thermal load.
High Quality Aluminum Structure for Strength and Light Weight
Constructed entirely from premium aluminum, this radiator strikes a balance between rigid strength and minimal mass. Aluminum's natural resistance to corrosion ensures the core and tanks withstand harsh environmental exposure without sacrificing performance. The material also conducts heat efficiently, so less temperature differential is required to move heat from coolant to air. As a result, your truck benefits from reliable cooling and a weight reduction compared to heavier steel designs.
Plug and Play Fitment for LS LT Manual Transmission Swaps
Engineered specifically for 1967-1987 C10, C15, K10, K15, Blazer and Suburban models with manual transmissions, this radiator installs without cutting or modification. Precision formed mounting tabs and inlet outlets match stock frame rails and hose locations to streamline installation. Technicians and DIY enthusiasts alike will appreciate a faster setup, since no custom brackets or adapter fittings are required. This direct fitment approach minimizes errors and keeps swap projects on schedule.
Finish Options that Resist Corrosion and Add Visual Appeal
Choose between a polished bare aluminum finish for a clean mechanical look or a black epoxy coating that offers added protection against rust and road debris. The epoxy layer bonds tightly to the aluminum surface, creating a barrier against moisture and salt spray. Meanwhile, the bare aluminum variant develops a natural patina over time, giving your truck a timeless shine. Both finishes are crafted in the USA to maintain consistent quality and long term durability.
For the same radiator but with fans consider our 1967-1987 GM Truck Radiator 20.75" Tall (Manual Transmission) with Fans - HD Cooling for added airflow assurance.