Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

GM 12-Bolt Rear End Identification & Upgrade Guide

Need a little help Identifying GM Body Styles 1964-1972? Click Here!

GM Body Styles

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

How to Identify GM Transmissions | 700R4, TH350, 4L60, TH400, 4L80e, Powerglide, & More

In this budget build, a GM rear end is upgraded in order to hold 400+ HP. See how spherical bushings are replaced in a used 8.5” GM 10 bolt rear end.

Replacing GM Rear End Spherical Bushings

Learn about GM alternator identification in our guide. We cover GM 3 wire alternators, 1 wire alternators, and externally regulated so you know what to choose.

GM Alternator Identification

All you need to know about racing a 602 GM crate engine and the necessary parts to make a race ready engine.

Racing a 602 GM Crate Engine

Tips and tricks to pull the most from your GM 602/604 platform.

Approved Upgrades for the GM Crate 602/604

Learn how to swap out an LS engine with a modern fuel injected engine into a hot rod for added horsepower, fuel economy, or throttle response. View a list of parts and helpful tips to complete the installation.

LS Swap Guide: GM 3 Speed / 4 Speed Parts List

Learn a few tips on how to properly mount Modified bodies and some products that will help get your race car body fabrication job done!

How to Mount a Modified Race Car Body

In this Tech Tip, John offers up a couple solutions to a customer wanting the best electric option to fuel his project.

Fueling a Model A Pickup

Engine Family Facets

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GM B-Body Buick Even Fire V6 Data Acquisition

GM B-Body Buick Even Fire V6 Data Acquisition | Speedway Motors

Shop GM B-Body Buick Even Fire V6 Data Acquisition and get Free Shipping on orders over $175 at Speedway Motors.

GM B-Body Buick Even Fire V6 Data Acquisition

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AC Delco 213-928 Coolant Temperature Sensor