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

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

Speedway Motors employee Steve upgraded the trailing arms on his 1976 Chevrolet Laguna with some spherical bushings.

Spherical Bushings for GM A-Body Trailing Arms

This article demonstrates how to install a complete Winters quick change kit with additional parts including birdcages, brackets, and calipers for a modified race car.

Quick Change Bolt On Components for a Modified Race Car

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

Heath P. tells his story on how the passion for 'hot rodding' was instilled in him by his grandfather. From driving tractors on their family farm to becoming a Ford family, you are in for a good read.

For the Love of the Flathead V8

Professional insight on some useful crate engine tools that will improve your engine building experience.

Engine Building Tool Guide

Learn about the power behind the G-body platform and the steps to upgrade a 7.5" bolt rear end to a 8.5" to withstand high horsepower. See how to change the differential fluid and install new gaskets.

Replacing a G-Body 7.5" Bolt Rear End

Learn how to set initial timing on the Chevy 350 SBC and the Ford 302. Our guide covers step by step instructions so you can set timing on your engine.

Ford 302 and Chevy 350 Timing Pointers - Step by Step Instructions

Engine Family Facets

707063f6-5cf0-44d1-8e1f-49059e48addf

3fe4cfeb-d42e-4b60-a312-2940d324f962

Box Chevy GM B-Body 401 Buick Nailhead Timing Components

Box Chevy GM B-Body 401 Buick Nailhead Timing Components | Speedway Motors

Shop Box Chevy GM B-Body 401 Buick Nailhead Timing Components and get Free Shipping on orders over $199 at Speedway Motors.

Box Chevy GM B-Body 401 Buick Nailhead Timing Components

Part

Brand

Availability

Discounts

Platform

Engine Code

Engine Version

Price

Customer Rating

Products

ACCEL 8124ACC Distributor Cap & Rotor Kit , Socket Style, Black

MSD 8442 Distributor Cap and Rotor, MSD, GM V8 Points

PerTronix D650701 Flame-Thrower V8 Distributor Cap, Red, Socket-Type