What were the Small Block engines available for First Gen Chevy Camaros?
307 in³ (5.0 L) version was produced from 1968 through 1973. Engine bore was 3.875 in (98.4 mm) with a 3.25 stroke.
The 307 replaced the 283 in Chevrolet cars and produced 200 hp (149 kW) SAE gross in the 1960s. The later emissions-modified versions produced just 115 hp (86 kW) SAE net, giving the engine one of the lowest power-per-displacement ratings of all time. Chevrolet never produced a high-performance version of this motor.
(Chevrolet produced for Outboard Marine Corporation, a high-performance marinized 307, rated at 235 and 245 hp SAE gross, depending on year, that shipped with the Corvette/Z-28's cast aluminum valve covers and Rochester QuadraJet carb. Chevy also built other versions of the OMC 307 rated at 210, 215 and 225 horsepower SAE gross.)
The 307 was also unique in the fact that its casting alloy had a very low nickel content making it relatively soft. Due to this fact, this engine has low value among rebuilders because of reduced longevity.
The 327 in³ (5.4 L) V8, introduced in 1962, was bored and stroked to 4 in (102 mm) by 3.25 in. Power ranged from 250 hp to 375 hp (186 kW to 280 kW) depending on the choice of carburetor or fuel injection. In 1962, the Duntov solid lifter cam versions produced 340 hp (254 kW), 344 ft·lbf (466 N·m) with single Carter 4-brl, and 360 hp (268 kW), 352 ft·lbf (477 N·m) with Rochester mechanical fuel injection. In 1964, horsepower increased to 365 for the now dubbed L76 version, and 375 for the fuel injected L84 respectively, making the L84 the most powerful naturally aspirated, single-cam, production small block V8 until the appearance of the 385 hp (287 kW), 385 ft·lbf (522 N·m) Generation III LS6 in 2001. * L76, L84 1963-1965; Chevrolet Corvette. This block is one of 3 displacements that underwent a major change in 1968/1969 when the main bearing size was increased from 2.30 in to 2.45 in.
The 350 in³ (5.4 L) V8. The first generation of Chevrolet small-blocks began with the 1955 Chevrolet 265 in³ (4.3 L) V8. But it was the 350 in³ (5.7L) series that set the standard for high performance. The engine's physical dimensions (oversquare 4.00 in bore and 3.48 in stroke, 102 mm by 88 mm) are nearly identical to the 400 hp (300 kW) LS2 engine of today, but of course much has changed. It is by far the most widely used Chevrolet small-block; it has been installed in everything from station wagons to sports cars, in commercial vehicles, a nd even in boats and (in highly modified form) airplanes!
A 350 is usually common with engine swaps - much of the older, pre-1968 Chevrolet V8s were usually swapped with a later 350 when engine replacement was the norm. It has been known to swap a 350 in place of a 305 since the 350 is part of the same engine family (the external dimensions of a Chevrolet small block are the same).
First usage of the 350 was in the 1967 Chevrolet Camaro and 1968 Nova producing 295 horsepower (gross); other Chevrolet vehicle lines followed suit in the year 1969.
The GM Goodwrench 350 crate motor (sold through Chevrolet dealerships) is based on the pre-1986 small block design with two dipstick locations; pre-1980 on the driver's side and post-1980 on the passenger's side. This motor was produced in Mexico since 1981 as the Targetmaster 350.
Note that Buick, Oldsmobile, and Pontiac all produced three entirely different 350 in³ V8 engines that shared nothing in common other than displacement. The Buick 350 had a 3.80 in bore and a 3.85 in stroke (96.52 mm by 97.91 mm), the Oldsmobile 350 had a 4.057 in bore and 3.53 in stroke (103 mm by 90 mm), and the Pontiac 350 had a 3.876 in bore and a 3.75 in stroke (98.5 mm by 89.66 mm).
The 302 in³ (5.4 L) V8 engine was only available in first-generation Z-28s (the 350 LT-1 was used in 2nd generation Z-28s), and was created in response to a Trans Am racing engine displacement limitation at that time of 5 litres (305ci). The 302 was created by installing a short-stroke 283ci engine crankshaft in a 327ci block, resulting in 302ci. This just fit the Trans Am limitation (the bores of the actual racing engines were tweaked to produce exactly 305ci) and this design (with special modifications for high-performance use) resulted in an unusual, high-revving engine that helped create the legend of the Z-28. The 302 was the only engine available in the first-generation Z-28.
L26 230ci/140HP L6 1BC - non-SS
L22 250ci/155HP L6 1BC - non-SS
Z28 302ci/290HP V8 4BC - Z-28 only
L14 307ci/200HP V8 2BC - non-SS, 1969 only
LF7 327ci/210HP V8 2BC - non-SS, eliminated during 1969
L30 327ci/275HP V8 4BC - non-SS, 1967-68 only
L65 350ci/250HP V8 2BC - non-SS, 1969 only
LM1 350ci/255HP V8 4BC - non-SS, regular fuel, 1969 only
L48 350ci/295HP V8 4BC - SS only, rated 300HP in 1969
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