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These entry level S/B Chevy crate engines are ideal for any street rod, muscle car or truck owner looking for over 300 hp performance on 87-octane fuel. Performer engines are 100% brand new and include a 4-bolt main GM short block, Edelbrock Performer heads, Performer Hydraulic camshaft, roller rocker arms, Performer Series intake manifold and optional water pump. A step-up in the Performer line; the Performer 320 has a 9.0:1 compression ratio and delivers 320 hp and 382 ft/lbs. of torque with the choice of Performer EPS or Performer Air-Gap intake manifolds. All Performer Classic engines feature Classic series fined valve covers in polished or black powder coated finish for a unique vintage look. Performer Classic 320HP engines also include a round Classic series air cleaner available in polished or black powder coated finish.