What is the difference between standard (STD) and undersize bearings?

Standard (STD) bearings are meant to be used when your crankshaft journals are still within the original factory specifications. Undersize bearings, like 0.010" or 0.020", are used when the crankshaft has been ground down to remove damage or wear, and you need a bearing with a slightly smaller inner diameter to maintain proper oil clearance.

What is the recommended oil clearance for these bearings?

Refer to the specific service manual for your Chevrolet V8 engine model. Proper oil clearance is critical for bearing life and is typically within a range of 0.0010" to 0.0025" for these types of engines, but always verify with your vehicle's documentation.

Do these bearings come with assembly lube?

This set includes the connecting rod bearings themselves. It is highly recommended to use a quality engine assembly lubricant when installing these bearings to ensure proper lubrication during initial startup and break-in.

ACL Chevrolet V8 396-402-427-454 Race Series Engine Connecting Rod Bearing Set

Specifications

Brand: ACL
Part #: 8B743HXXD-STD

ACL Chevrolet V8 396-402-427-454 Race Series Engine Connecting Rod Bearing Set

Name: ACL Chevrolet V8 396-402-427-454 Race Series Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-race-series-engine-connecting-rod-bearing-s-t14-631147
Price: 134.72 USD
Availability: InStock

$134.72

Only 1 left in stock

Key Features

Fits 1965-1974 Chevrolet and GMC V8 vehicles with 396-454 cubic inch engines.
ACL Race Series connecting rod bearings are constructed with a tri-metal material for improved load capacity.
Standard (STD) size bearings are designed for use with factory-spec crankshaft journals.
Steel-backed overlay provides a strong foundation for the bearing material.
Copper-lead alloy intermediate layer offers excellent heat dissipation and embeddability.
Lead-tin overlay ensures a smooth mating surface with the crankshaft journal.

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Will this fit your vehicle?

Product Details

If you're building a performance V8 for your classic Chevy, these ACL Race Series connecting rod bearings are a solid choice. They're designed for engines like the 396, 402, 427, and 454, which are common in many Chevrolet and GMC trucks, muscle cars, and full-size sedans from the late 60s through the mid-70s. These bearings are crucial for ensuring proper clearance and lubrication between the connecting rod and the crankshaft, which is especially important when you're pushing more power than stock.

ACL uses a tri-metal material construction in their Race Series bearings. This means they're built with a steel-backed overlay, a copper-lead alloy intermediate layer, and a lead-tin overlay. This combination is well-known for its strength and ability to handle higher loads and temperatures, making them a popular option for modified engines. The standard (STD) size means they're meant to be used with a crankshaft that's within factory specifications, without any grinding or reconditioning.

When you're installing these, make sure your crankshaft journals are clean and within the manufacturer's recommended tolerances for straightness and surface finish. Proper oil clearance is key to the longevity of both the bearings and your engine build. These bearings fit a wide range of Chevrolet and GMC vehicles from 1965 to 1974, including popular models like the Impala, Chevelle, Camaro, Corvette, and C/K series trucks.