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

Standard (STD) bearings are meant for crankshafts that are still within their original factory specifications. If your crankshaft has been machined undersize due to wear or damage, you will need to use bearings that are sized to match the machined journal diameter.

What other parts are typically replaced during a main bearing job?

When replacing main bearings, it's common practice to also inspect and potentially replace rod bearings, piston rings, and oil seals. A thorough inspection of the crankshaft journals for wear or damage is also essential.

Does this bearing set include the necessary hardware for installation?

This listing is for the ACL Race Series crankshaft main bearing set only. Installation hardware, such as main bearing bolts or crankshaft seals, are typically sold separately and should be sourced according to your engine's service manual.

ACL Chevrolet V8 265-283-302-327 Race Series Engine Crankshaft Main Bearing Set

Specifications

Brand: ACL
Part #: 5M429H-STD

ACL Chevrolet V8 265-283-302-327 Race Series Engine Crankshaft Main Bearing Set

Name: ACL Chevrolet V8 265-283-302-327 Race Series Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-265-283-302-327-race-series-engine-crankshaft-main-bearing--t14-630621
Price: 128.81 USD
Availability: BackOrder

$128.81

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ACL Chevrolet V8 265-283-302-327 Race Series Engine Crankshaft Main Bearing Set.

Key Features

Fits 1955-1967 Chevrolet and GMC V8 engines with 265-327 cubic inch displacements.
ACL Race Series main bearing set designed for performance applications.
Well-built overlay material helps maintain oil film and resist wear.
Standard size (STD) for use with factory-spec crankshafts.
Supports crankshaft rotation and maintains proper oil clearance.

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Will this fit your vehicle?

Product Details

When you're rebuilding a classic Chevrolet V8, getting the bottom end right is crucial. This ACL Race Series crankshaft main bearing set is built for those engines, covering displacements from 265 cubic inches up to 327. These bearings are designed to handle the demands of performance builds, ensuring proper oil clearance and support for your crankshaft under load.

ACL has been making engine bearings for a long time, and this Race Series set uses a well-built overlay material that's known for its durability and ability to maintain oil film. They're a solid option if you're looking for reliable internal engine components for your project. The standard size (STD) means they're intended for crankshafts that are still within factory specifications, without excessive wear.

This set is specifically for the main bearings, which support the crankshaft in the engine block. Make sure you have the correct specifications for your engine build, especially regarding oil clearance, before installation. If your crankshaft has been machined undersize, you'll need a different bearing size.