Gen 1 5.7L crate engines are excellent entry-level performance engines for older cars, trucks, and street rods. All of the parts in these engines are brand new. These Chevrolet Performance Goodwrench 5.7L/350 c.i.d. engines have approximately 8.5:1 compression with a horsepower rating of 249 hp and 304 ft.-lbs. of torque. These crate engines have a 4.00 in. bore and a 3.48 in. stroke with 4-bolt mains and 2-piece rear main seals.
Camshaft specifications are .390 in. intake lift and .410 in. exhaust lift. The open duration is 195 degrees intake and 202 degrees exhaust at .050 in. with a 112 degree lobe separation. The cylinder heads are cast iron with 1.94 in. intake valves and 1.50 in. exhaust valves, 76cc combustion chambers, and 7-bolt style exhaust flanges. These engines include painted valve covers, oil pans, and timing covers. They are drilled for both left hand and right hand dipsticks.
When installed in the following vehicles, these engines carry a 36-month or 100,000-mile warranty:
* 1975-78 Chevy/GMC pickup (C1)
* 1975 Chevy/GMC Blazer, Jimmy (C1)
* 1975 Chevy/GMC van (G1)
* 1978-80 Chevy/GMC van (G2,3)
* 1979-85 Chevy/GMC pickup, Suburban, Blazer, Jimmy (K1)
* 1979-80 Chevy/GMC pickup, Suburban, Blazer, Jimmy (CK1)
* 1979-80 Chevy/GMC Suburban (CK 1, 2)
* 1979-85 Chevy/GMC Suburban (CK 1)
* 1980-85 Chevy/GMC van (G1, 2, 3)
* 1981-82 Chevy/GMC pickup (CK1)
* 1983-85 Chevy Caprice Classic, Impala (B)
* 1973-80 Chevy Corvette (Y)
* 1984-85 Pontiac Parisienne (B)
If this engine is installed in any other application, it has a 12 month or 12,000-mile warranty (parts only, no labor).
Dyno test numbers are from an independent test as reported by Hot Rod Magazine using a GM cast iron Quadrajet intake, Quadrajet carburetor, HEI distributor and 1-5/8 in. long tube headers.
This engine is not designed, nor intended to be used in any marine applications. Engines installed in vehicles registered and normally operated outside of the United States carry no warranty. Can be used in light duty pickups of 7200 GVW or less. Pilot bearing is installed for use with a manual transmission; remove if an automatic transmission is to be used.
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