427 ci Aluminum LS Short Block - Callies 8-cwt Crank for NA Applications Shaft Mount Rockers 750 inch main diameter and

750 inch main diameter and I-beam Ultra Enforcer rods

A quick summary however would be:

race or marine

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427 ci Aluminum LS Short Block - Callies 8-cwt Crank for NA Applications Shaft Mount Rockers 750 inch main diameter andAvailable in either an RHS or Dart aluminum block, this short block is intended for naturally aspirated, pump gas applications. The RHS version includes the required custom timing cover. It is the foundation of our 800 horsepower, naturally aspirated, pump gas build. This beast can drive to the track and tear it up when it gets there without breaking a sweat as you'll see in the video below. An aluminum block transfers heat better than its iron