{"product_id":"performance-radiator-with-shroud-for-chevrolet-c-k-trucks-1973-1974-4-1l-4-8l-5-0l-5-7l","title":"Performance Radiator with Shroud for Chevrolet C\/K Trucks (1973-1974) 4.1L 4.8L 5.0L 5.7L","description":"\u003ch2\u003eDirect-Fit Aluminum Performance Radiator with Shroud for 1973-1974 Chevrolet C\/K Trucks\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Radiator with Shroud replaces the failure-prone original copper-brass unit on 1973-1974 Chevrolet C\/K Trucks to eliminate thermal throttling and improve heat dissipation under heavy towing loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet C\/K Trucks Thermal Bottleneck\u003c\/h3\u003e\n\u003cp\u003eEarly third-generation \u003cstrong\u003eSquarebody C\/K\u003c\/strong\u003e trucks left the factory with traditional copper-brass radiators joined by lead-based solder. Over decades of heat cycling, galvanic corrosion degrades the internal passages while the core fins loosen, drastically reducing thermal conductivity. In addition, the factory mechanical belt-driven clutch fan robs rotational torque from the crankshaft and stalls heat extraction during low-speed crawling or heavy hauling. When matched with increased modern highway speeds or working loads, the original cooling system suffers from severe heat soak, elevated cylinder head temperatures, and coolant boilover.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis cooling assembly upgrades your \u003cstrong\u003eGM C\/K\u003c\/strong\u003e platform to an all-aluminum tube-and-fin core flanked by precision TIG-welded aluminum end tanks. High-density louvered aluminum fins provide a substantially greater surface area for heat exchange compared to worn OEM cores. Structural TIG welds eliminate the mechanical failure points of aged solder seams and crimped tanks. Paired with a form-fitted aluminum fan shroud and dedicated high-CFM electric fan assembly, this system pulls continuous airflow across the entire core matrix, regardless of engine RPM, maintaining consistent coolant temperatures across both high-speed grades and extended idle conditions.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1973-1974 Chevrolet C\/K Trucks (C10, C20, C30, K10, K20, K30)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eInline-6 (250ci 4.1L, 292ci 4.8L) \u0026amp; Small Block V8 (307ci 5.0L, 350ci 5.7L) \/ Squarebody (3rd Gen C\/K)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e100-160 hp \/ 175-255 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eCC161\u003c\/strong\u003e, \u003cstrong\u003eMC161\u003c\/strong\u003e, \u003cstrong\u003eDPI161\u003c\/strong\u003e, \u003cstrong\u003e161\u003c\/strong\u003e, \u003cstrong\u003eCU161\u003c\/strong\u003e, \u003cstrong\u003eRAD161\u003c\/strong\u003e, \u003cstrong\u003eSBR161\u003c\/strong\u003e, 3023837, 3025227\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1973-1974 Chevrolet C10 Pickup (4.1L 250ci I6, 4.8L 292ci I6, 5.0L 307ci V8, 5.7L 350ci V8)\u003c\/li\u003e\n  \u003cli\u003e1973-1974 Chevrolet C20 Pickup (4.1L 250ci I6, 4.8L 292ci I6, 5.0L 307ci V8, 5.7L 350ci V8)\u003c\/li\u003e\n  \u003cli\u003e1973-1974 Chevrolet C30 Pickup (4.8L 292ci I6, 5.7L 350ci V8)\u003c\/li\u003e\n  \u003cli\u003e1973-1974 Chevrolet K10 4WD Pickup (4.1L 250ci I6, 5.7L 350ci V8)\u003c\/li\u003e\n  \u003cli\u003e1973-1974 Chevrolet K20 4WD Pickup (4.8L 292ci I6, 5.7L 350ci V8)\u003c\/li\u003e\n  \u003cli\u003e1973-1974 Chevrolet K30 4WD Pickup (4.8L 292ci I6, 5.7L 350ci V8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the Squarebody C\/K Trucks?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1973-1974 Chevrolet C\/K Trucks equipped with the \u003cstrong\u003eInline-6\u003c\/strong\u003e or \u003cstrong\u003eSmall Block Chevy\u003c\/strong\u003e engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the electric fan be wired into the factory harness directly?\u003c\/strong\u003e\u003cbr\u003e No, a dedicated 30-to-40 amp relay harness triggered by an adjustable thermostatic switch is recommended to ensure safe electrical operation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eSquarebody Chevrolet trucks earned their reputation through dependable torque and unmatched utility on job sites and back roads. Upgrading to a modern, fully welded aluminum cooling system preserves that heritage by ensuring reliable operating temperatures during continuous heavy towing, payload hauling, and off-road trail runs.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50593934803192,"sku":"DS-E26KW7CLF","price":320.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-radiator-with-shroud-for-chevrolet-c-k-trucks-1973-1974-4-1l-4-8l-5-0l-5-7l-1.jpg?v=1790053611","url":"https:\/\/performancechiptuning.com\/products\/performance-radiator-with-shroud-for-chevrolet-c-k-trucks-1973-1974-4-1l-4-8l-5-0l-5-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}