The L34 used a 4-barrel carburetor and produced and . The 455 "big block" Olds V8 was replaced in 1977 with the "small block" V8. It used a wide bore, the largest ever used in a small-block V8, with the Olds small-block standard deck and stroke. The bore was so wide that the cylinder walls were "siamesed" (similar to the Chevrolet 400 CID small block engine) — there was no space for coolant flow between the cylinders. This sometimes led to overheating problems. Some very early 403s were painted metallic blue like the 455, but most were painted GM Corporate Blue. The Olds 403 was used by Buick and Pontiac in addition to Oldsmobile. The engine was only produced through 1979. Output was and . The Toronado version of the 1977 Oldsmobile 403 engine was fitted with a crank triggered ignition system. Parts peculiar to this system include a toothed disc between the harmonic balancer and the crank pulley, the adjacent sensor (which predated the modern-day crankshaft position sensor, which Oldsmobile used with their Quad 4 in the late 1980s with a cast-in toothed section of the crankshaft), a special distributor, an engine temperature sensor, and a rudimentary computer mounted inside the car, under the dash. No other years or models were provided with this system. Applications:  A smaller V8 was produced in 1975 by decreasing the bore to just . This was the first powerplant to use the smaller Rochester Dualjet two-barrel carburetor; all 260s used it. Production of the 260 V8 ended in 1982 when the 307 became the only gasoline V8 in Oldsmobile's line. The 260 was designed for economy and it was the first engine option above the 3.8 L Buick V6 standard in many Oldsmobile models by the late 1970s. While the 260s were not very powerful compared to the larger 350 and 403 V8s, fuel economy was almost as good as the base V6. Compared to the V6, the 260 was also smoother-running, and far more durable. Most 260s were coupled to the Turbo Hydramatic 200. A 5-speed manual transmission was also available with some 260-equipped vehicles. The LV8 was produced from 1975-1982. It produced and . Applications:  A slightly larger version was introduced in 1980. It uses a bore (in common with the Buick 231 V6 and 350 V8) with a stroke.