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Barkley wanted to increase the   horsepower of the Impala’s LT1 so he added a Crane hydraulic cam, matching valvesprings, and 1.6 roller rockers.   He also had some minor bowl work   and a valve job on the cylinder heads.
Planning For Power - Pro Touring 1981 Chevy El Camino

Barkley wanted to increase the horsepower of the Impala’s LT1 so he added a Crane hydraulic cam, matching valvesprings, and 1.6 roller rockers. He also had some minor bowl work and a valve job on the cylinder heads.  View Related Article