HISTORY: 307 / 5.0

[] 307 / 5.0L

3.875 in Bore

3.25 in Stroke

307 CID 1968-1973

 A 307 cu in (5,025 cc) version was produced from 1968 through 1973. Engine bore was 3.875 inches with a 3.25-inch stroke. All 307s had large 2.45" journals - the crankshaft is sourced from the 327. Pistons used with the 307 share the same pin height as the 327 but retaining the 283's bore size (prior to 1968 it was possible to stroke a 283 into a 307 where aftermarket pistons had to be used). This engine was also used by Holden in Australia and by General Motors' South African arm. This engine shares many of its dimensions with the 230 inline-six and with the 153 four-cylinder.

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