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This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in 3 (1980-1983).
Chevrolet Turbo-Thrift engine The GMC straight-6 engine was a series of gasoline -powered straight-six engines introduced in the 1939 model year by the GMC Trucks division of General Motors . Prior to the introduction of this new engine design GMC trucks had been powered by straight-six engines designed by the Buick , Pontiac and Oldsmobile ...
The head casting number (which can be viewed from the passenger side of the vehicle just in front of the valve cover) was 706. Some heads with this casting number would fail (but not all of them) as GM had different suppliers for the same head. The failure was due to undetected porosity around the oil drains in the head. [93]
In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. Also added was the #48 casting number heads with a 68 cc (4.15 cu in) chamber for higher compression, along with larger 2.11 and 1.77 in (54 and 45 mm) valves.
L05s were used primarily with casting number 14102193 (64cc combustion chambers) cylinder heads with swirled intake ports—the intake ports were designed for fuel economy (the design was also shared with the 103 heads used on the 4.3L with TBI). The swirl ports (known to GM as a vortex chamber) along with the irregular shape of the combustion ...
Unlike most other car makers at the time, Buick had been using a valve-in-head/OHV overhead valve reverse-flow cylinder head design or I-head since their inception and continued this practice in their straight-eight designs.
It was its own separate engine design, based on a single block casting, [19] which had four exhaust manifolds, two carburetors and intake manifolds, and two distributor caps driven by a single distributor drive, [19] plus other parts from the 351 V6. A total of 56 major parts are interchangeable between the Twin-Six and the other GMC V6 engines ...
At that time, the only "small" engines generally offered by GM were built by the Chevrolet division including the 140 cu in (2.3 L) OHC aluminum inline-four engine used in the subcompact Chevrolet Vega and a 250 cu in (4.1 L) straight-6 used in smaller Chevy, Buick, Oldsmobile and Pontiac models, whose design roots dated back to the 1962 Chevy ...