changed that about a year ago with the introduction of an all-new iron casting for the GM, 871/48-inch-ring-gear, passenger-car 12-bolt rearend. Now four unique cases are available to cover four ...

This includes a choice of differential type and gear ratio, making it easy to build a drop-in third member for your classic Chevy. If you still have a 10- or 12-bolt axle in your Chevy ...