Chevrolet Performance’s 1989 Silverado dually was nearly consigned to the scrapyard at GM’s Milford Proving Ground in Michigan. However, a last-minute rescue transformed this old workhorse into a showcase for the mighty ZZ632/1000 crate engine.
Recently featured on the 2024 HOT ROD Power Tour, the Silverado exemplifies the potent capabilities of Chevrolet’s largest-displacement crate engine. With 1,004 horsepower and 876 lb-ft of torque on tap from its 632 cubic inches, the ZZ632 breathes new life into this vintage truck.
Driven by Jeff Walker, General Motors’ Engineering Group Manager, the Silverado tackled each stop of the Power Tour with ease, impressing enthusiasts and onlookers alike. Originally destined for oblivion, this truck now serves as a testament to the versatility and power of Chevrolet’s latest Big-Block offering.
The ZZ632 engine, introduced in late 2021, boasts a cast-iron Sportsman Bowtie block and modern EFI technology for precise fuel management. Despite its immense power, Walker’s team ensured seamless integration, refining everything from cold starts to drivability in GM’s rigorous testing environments.
Enhanced with a 4L85-E transmission, Detroit locker rear end, and upgraded suspension components, the Silverado retains its original charm with a weathered exterior that adds character to its robust performance.
Displayed proudly at the Power Tour, the ZZ632-equipped Silverado stands as a testament to Chevrolet’s commitment to innovation and performance, drawing admiration from all who witness its resurrection.
This development mule, with its raw exterior and formidable engine, embodies Chevrolet’s ethos of blending heritage with cutting-edge technology, promising enthusiasts a thrilling glimpse into the future of performance vehicles.
Source: Chevrolet/The-Block
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