48557 Features:

• 4-Bolt Main Bearing Caps
• 1.7:1 Roller Rocker Arm Ratio
• Cast Aluminum Valve Covers
• Forged Aluminum Pistons
• Aluminum Cylinder Heads
• Forged Steel Crankshaft
• Cast Iron Engine Block

48557 Notes:

The engine is supplied with Edelbrock Break-In Oil in the crate. Before starting the engine, you will need to prime the oil system. Do not turn the engine over with the starter motor for priming. Mark the distributor, as it comes preset on the #1 cylinder. Then, remove and use a priming tool to turn the pump shaft.  

Change the engine oil no more than 300 miles after the break-in. Use of oil with zinc or a zinc additive for the life of your engine is recommended.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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