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Rear View - November 2013

Shelby Swap

This unpublished photo was taken in 1965 as part of a Car Craft article covering the Shelby-American (S-A)–built 289-inch Ford small-block. This engine was one of three recipes offered by S-A and built at its shop in Venice,California. Since this engine hasn't really changed since its introduction in 1964,it was interesting to see that the same basic combinations still work,today. To make 390 hp on gasoline,S-A used a camshaft with 0.500 lift and 295 degrees of duration (we're assuming that is advertised),selected the heads with the smallest combustion chamber,cranked up the oil pressure to 60 psi,and let fly with some 7,000-rpm runs,using a set of four twin-venturi Weber downdrafts. The engine in the photo is a less-exciting street engine with a much smaller cam and a pair of Carter AFB carbs on a Cobra twin-carb manifold.

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