Buick GS Interior Lighting

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

In this Tech Tip, John answers a customer question about the Speedway Motors fiberglass T-Bucket kit bodies, and the potential need for reinforcement.

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.

In this Tech Tip, John talks about what can be expected when converting to suicide doors.