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Chevrolet introduced the 350 cu in (5.7 L) LT-1 in 1970, making it available in both the Corvette and Camaro. It was an optional engine in the Corvette, and available as part of the high-performance ZR-1 option. Between 1970 and 1972, only 53 ZRs were produced, making it one of the rarest Corvettes.
It included the special equipment in the ZR1 package, but for the 454 LS-6 engine. Per GM policy, 1971 Corvette engines were detuned to run on low-lead fuel, except for the LS-6 V8, which was rated at 425 bhp (317 kW) on premium fuel. 188 cars in the 1971 model included the LS-6 engine, with only 12 with the ZR-2 package, including only 2 ...
Although the 1972 model's 350 cu in (5.7 L) horsepower was actually the same as that for the 1971 model year, the lower net horsepower numbers were used instead of gross horsepower. The L48 base engine rating fell to 200 hp (149 kW; 203 PS) SAE and the optional LT1 dropped to 270 hp (201 kW; 274 PS) SAE.
All engines in this family share the same block dimensions and sometimes even the same casting number; the latter meaning engines were of the same block, but with different strokes (e.g., the casting number 3970010 was used by all three engines: 302, 327, and 350). This engine family was updated in 1968 for the use of 2.45 in (62.2 mm) medium ...
Above the 1-ton 30/3500 model ranges, the C-series truck (C=Conventional) served as a basis for medium-duty conventional trucks marketed by both Chevrolet and GMC. The model range was produced under three series: the 1 + 1 ⁄ 2-ton C40 (GMC C4500) and two 2-ton trucks; the "light" C50 (GMC C5500) and "heavy" C60 (GMC C6500). [22]
The 120 hp (89 kW; 122 PS) (4.4 L) 267 cu in V8 engine became an option on the base, RS and Berlinetta models. The 350 cu in (5.7 L) V8 was only available on the Z28. The Z28 hood included a rear-pointing raised scoop with a solenoid operated flap which opened at full throttle, allowing the engine to breathe cooler air. A federally mandated 85 ...
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Only 53 of these packages were optioned during the 1970 to 1972 model years. For the 4th generation (C4) , the ZR1 was the top-tier package that was available from 1990 to 1995, with a special engine designed in partnership with Lotus, after General Motors acquired Group Lotus , and with the objective of creating the world's fastest production car.