Car enthusiasts often find themselves puzzled by GM’s crate engine nomenclature, and the 602 is no exception. At first glance, you might assume it refers to cubic inches, but this small-block designation is purely a catalog identifier. Despite the numeric confusion, the 602 has earned a loyal following for its balance of reliability, performance, and affordability.
Underneath its familiar exterior lies a stout small-block Chevy architecture that delivers roughly 300 horsepower at around 5,000 RPM, with torque tipping the scales near 330 lb-ft at about 3,600 RPM. These figures place the 602 firmly in the mid-performance class—plenty of oomph for hot rods, project trucks, or muscle car restorations without venturing into exotic price territory.
It’s worth unpacking why the 602 badge can be misleading. Unlike big-block monikers that directly reference displacement, this number is an internal GM code. In reality, you’re getting a 305-cubic-inch mill, featuring classic Chevy architecture that’s been optimized for turnkey installation and minimal modification.
GM outfits the 602 with reliable hardware such as hydraulic roller lifters, aluminum heads, a hydraulic roller camshaft, and forged steel crankshaft. This combination ensures durability and ease of tuning, making it a favorite for builders who want a solid foundation without the guesswork that comes with sourcing individual components.
On the price front, GM’s suggested retail hovers around $2,100, though real-world figures—including shipping, handling, and any core charges—can push the total closer to $2,400 or more, depending on your dealer. Factor in installation costs and any supporting modifications, and you’re looking at a budget-friendly package that still delivers a reliable powerplant.
From a builder’s perspective, the cost-per-horsepower ratio of the 602 is very competitive. At roughly $7 to $8 per hp, it stands up well against both new aftermarket offerings and rebuilt vintage mills. For someone seeking a solid street performer without breaking the bank, the 602 offers an appealing middle ground between raw power and everyday practicality.
In conclusion, the GM 602 crate engine may carry a misleading number, but its combination of 300 hp, 330 lb-ft of torque, and roughly $2,100 price tag makes it a compelling choice for a wide range of builds. Whether you’re restoring a classic or drop-in swapping a reliable small-block, the 602 punches above its catalog number, delivering robust performance at a sensible investment.
